Beginner's guide

A step-by-step walkthrough of a complete flight in the LVFR A380-800 for Microsoft Flight Simulator, from a cold dark gate to shutdown at your destination. If this is your first time in a full glass-cockpit airliner, start at Chapter 1.

For simulation purposes only. Procedures are simplified for the simulator context and may differ from real-world airline operations.
1
Getting to know the cockpit
A map of every screen and panel before you touch anything. Learn what the PFD, ND, EWD, SD, FCU, CDU and EFB do and where to find them.
PFD / ND / EWD / SDFCUCDU & EFBOverhead panel
2
Powering up from cold & dark
How to bring a completely dark aircraft to life: batteries, ground power, the self-test overlay, and IRS alignment.
BatteriesExternal power (GPU)IRS alignment — 11 min
3
Setting up the flight computer (FMS / CDU)
Program the CDU with your route, fuel & weight, SID, STAR, approach, and takeoff speeds. Includes SimBrief import via the EFB.
INIT pageFuel & loadF-PLN & SimBriefV1 / VR / V2
4
Engine start & taxi
Start the APU, start all four engines in sequence, configure for departure, and taxi with the ETACS belly camera and BTV setup.
APU startEngine start sequenceETACS cameraBTV setup
5
Takeoff & climb
FCU setup, FLEX or TOGA thrust, rotation, gear and flap retraction schedule, autopilot and auto-thrust engagement, managed climb to cruise.
FLEX / TOGARotation & flap scheduleAP1 / A/THRManaged speed
6
Cruise
Reading the ECAM Cruise page, monitoring fuel burn, planning step climbs, enabling traffic and weather on the ND, and understanding T/D and ETP markers.
ECAM cruise pageStep climbsTRAF / WX buttonsETP marker
7
Descent planning & approach preparation
When and how to set up the arrival procedure, enter QNH, arm the ILS display, and command the descent at the T/D point.
STAR & approach setupPERF APPR pageLS button — ILS needlesOpen descent
8
Approach & landing
Approach phase activation, managed speed flap sequence, ILS LOC and glideslope capture, BTV brake-to-vacate, manual landing technique, and go-around.
ILS LOC + G/SManaged speed on approachBTVGo-around
9
After landing & shutdown
Taxi to the gate using the ETACS camera, connect ground power, shut down engines and APU, and optionally return to a cold & dark state.
Engine shutdownAPU shutdownCold & dark

Also in the docs

Getting to know the cockpit

Before your first flight, it helps to know what you are looking at. The A380 uses a "glass cockpit" — almost everything is shown on large screens rather than traditional round gauges. This chapter maps every major display and panel so nothing catches you off guard.

The screens

PFD
Primary Flight Display — the main instrument in front of each pilot. Shows airspeed (left tape), altitude (right tape), attitude (the artificial horizon in the centre), and autopilot mode information across the top strip.
ND
Navigation Display — the moving map next to each PFD. Shows your programmed route, nearby airports, traffic (when enabled), weather radar (when enabled), and computed path markers like T/C, T/D, and DECEL.
EWD
Engine Warning Display — the upper centre screen. Shows engine thrust levels (N1%), fuel flow, and any active warnings, cautions, or checklists.
SD
System Display — the lower centre screen. Automatically cycles through aircraft system pages (fuel, electrics, hydraulics, etc.) based on what the aircraft is doing. You can also select any page manually with the ECAM Control Panel buttons below the screen.
FCU
Flight Control Unit — the long horizontal panel at the top of the glareshield. You dial in speed, heading, altitude, and vertical speed here. The autopilot (AP1/AP2) and auto-thrust (A/THR) buttons are also on this panel.
CDU
Control Display Unit — the keyboard/screen on the centre pedestal. This is the flight computer interface for programming your route, entering fuel and weight data, calculating takeoff speeds, and managing every aspect of the flight plan.
EFB
Electronic Flight Bag — a tablet on the outboard side panel. Used to load fuel and passengers, calculate takeoff performance, import SimBrief flight plans, and control ground services.

The overhead panel

The large panel above and behind the pilots' heads contains switches for every aircraft system: electrics, hydraulics, fuel, air conditioning, and lighting. For a basic flight you only need a small section of it — the electrical switches and the ADIRS knobs for IRS alignment.

Do not be overwhelmed by the overhead panel. Focus on the screens and FCU while flying; the ECAM system pages monitor everything else automatically.

The pedestal

The console between the two seats contains the four engine thrust levers, the flap lever, the speedbrake lever, the CDU keyboards, the Radio Management Panels (RMP) for tuning frequencies, and the parking brake.

Powering up from cold & dark

Starting "cold and dark" means the aircraft has no electrical power at all — just as it would be parked overnight at a real gate. You need to bring systems on in the right order before anything else can happen.

Step-by-step

1
Turn on both batteries
On the overhead panel, find the ELEC section. Click BAT 1 and BAT 2 to ON. At this point the screens are still dark — the batteries alone do not power the displays.
2
Connect external ground power (GPU)
Open the EFB tablet and go to Ground Services. Request Ground Power and wait a few seconds for the unit to connect. On the overhead ELEC panel, the EXT PWR button will illuminate with an AVAIL legend. Press it to accept. All screens light up.
You can start the APU instead of using ground power, but the APU needs battery power to start and takes 30–60 seconds. Ground power is faster and simpler at the gate.
3
The self-test (normal)
Within seconds of the screens lighting up, a brief green overlay flashes across the PFD, ND, EWD, and SD. This is the built-in safety test confirming all displays work. It clears on its own — do not try to dismiss it.
4
Start IRS alignment — critical
On the overhead panel, find the three ADIRS knobs (labelled IR 1, IR 2, IR 3). Turn all three from OFF to NAV. The displays will show red flags and the word ALIGN. This is normal. The navigation computers need approximately 11 minutes to calculate their exact position using internal gyroscopes.
Why does it take 11 minutes? The IRS uses extremely precise gyroscopes to figure out where it is without GPS. During alignment it must be completely still — any movement disrupts the process. Once aligned, it can track your position even if GPS is unavailable.
If you load the aircraft already on a runway or in the air, the IRS pre-aligns automatically and displays show valid data immediately.

What to do during the 11-minute wait

  • Open the EFB and enter your fuel quantity and passenger weight
  • Start programming the CDU with your route (see Chapter 3)
  • Tune your departure radio frequency on the RMP panels
  • Set the transponder squawk code on the SURV page in the CDU

When alignment is complete, the red flags disappear and your current position appears on the ND map.

Setting up the flight computer

The CDU (Control Display Unit) is where you tell the aircraft everything it needs to know about the flight. For a standard route you only need four pages: INIT, FUEL&LOAD, F-PLN, and PERF.

Want the deep version? The FMS / CDU deep dive in Advanced systems covers what happens behind the scratchpad.

INIT page — start here

Press the INIT button on the CDU keypad.

FROM/TO
Type your departure airport ICAO code, a slash, then destination. Example: EGLL/KJFK. Press the button next to this field.
CRZ FL
Your cruise flight level. FL370 = 37,000 feet. Type 370 and press the button next to CRZ FL.
COST INDEX
Balances speed vs. fuel economy. 0 = maximum fuel saving, 100+ = prioritise speed. Use 30 as a safe starting point.
TROPO
The tropopause altitude. Leave at default (36,090 ft) unless you have specific weather data.

FUEL & LOAD page

From the CDU menu, scroll to and select FUEL&LOAD.

ZFW
Zero Fuel Weight — total weight of aircraft + passengers + cargo, without fuel, in tonnes. A full A380 is typically 370–390 t ZFW. If you loaded passengers in the EFB, this field may pre-fill.
ZFWCG
Centre of gravity as a percentage. A value between 28% and 34% is normal.
BLOCK
Total fuel loaded in kg. Match this to what you loaded in the EFB.
TAXI
Fuel expected to be burned during taxi. Typically 500–800 kg for a long-haul flight.

F-PLN page — your route

Press F-PLN. Initially you will see just your departure and destination airports.

  • Adding a SID — press the button next to your departure airport, select DEPARTURE, choose your runway, then pick a SID from the list. Press INSERT.
  • Adding waypoints manually — type a waypoint ICAO name in the scratchpad at the bottom, then press the button next to where you want to insert it.
  • Adding a STAR and approach — press the button next to your destination, select ARRIVAL, choose runway, STAR, and approach type. Press INSERT.
After any change to the flight plan, a yellow TMPY F-PLN label appears at the bottom-right of the screen. This means the change is pending. Press INSERT to confirm or ERASE to cancel.

Loading a route automatically

Hand-typing the route works, but most of the time you'll load it from somewhere else. There are three common ways to get a full flight plan into the CDU without entering every waypoint by hand — which one you use depends on your simulator version.

1 — SimBrief import (EFB)

SimBrief is a free online flight planner (part of Navigraph). You build your route on simbrief.com — it generates an OFP (operational flight plan) with the airways, SID, STAR, cruise altitude, cost index, and a fuel and payload breakdown.

1
Find your SimBrief Pilot ID
In your SimBrief account settings there is a numeric Pilot ID. You enter this once in the aircraft EFB so it knows which account to pull from.
2
Open the EFB → SimBrief page
On the EFB tablet, open the SimBrief / flight plan import page and enter your Pilot ID. The EFB fetches your most recently generated OFP.
3
Import into the FMS
Import the plan — the route (waypoints, airways, SID, STAR), cruise level, and cost index populate the CDU automatically. The fuel and payload figures can also be used to load the aircraft and pre-fill the FUEL & LOAD page.
SimBrief import is the fastest way to set up a realistic flight, and it works the same way regardless of simulator version. Generate the OFP on the website first, then import in the EFB.

2 — MSFS 2020 world map (loads on spawn)

In Microsoft Flight Simulator 2020, you can build your flight plan on the sim's main World Map screen before you start the flight — pick departure and arrival, choose a runway, SID, STAR, and routing (or load a .pln file).

When you then spawn into the A380, that world-map flight plan is automatically loaded into the CDU. You'll find your route already on the F-PLN page when you load in — no manual entry needed to get started.

World-map routes are sometimes simplified (high-altitude direct legs, or a generic procedure). Always review the F-PLN and ND after spawn, and refine the SID, STAR, and approach in the CDU if needed.

3 — MSFS 2024 native EFB

In Microsoft Flight Simulator 2024 the flight-planning workflow changed. Rather than relying on the world-map-to-CDU spawn behaviour, FS2024 uses its own built-in native EFB (the simulator's EFB, separate from the aircraft's tablet) to create and edit the flight plan.

A flight plan built with the FS2024 native EFB loads into the A380 CDU. So on FS2024, the recommended path is: build or adjust your plan in the native FS2024 EFB, and it syncs into the aircraft's FMS.

Important caveat (FS2024): the EFB flight plan only transfers into the CDU correctly once you have actually spawned into the aircraft. Make sure the flight has loaded and you are in the cockpit before expecting the plan to be in the FMS — if you check too early, or before the aircraft has fully spawned, the route may not be there yet. If it looks wrong, give it a moment after spawn, then re-check the F-PLN page.
FS2020 vs FS2024 — know which you're on. On FS2020 use the world map and the plan loads on spawn. On FS2024 use the native FS2024 EFB to build the plan and it loads into the CDU. SimBrief import via the aircraft EFB works on both.

What you will see on the map

After programming, your route appears as a magenta line on the ND. Computed markers appear along it:

T/C
Top of Climb — where you will reach cruise altitude.
T/D
Top of Descent — where you should start going down.
DECEL
Deceleration point — where to begin slowing for the approach.
S/C
Speed Change — a speed restriction exists at this point.

Performance page — takeoff speeds

Press PERF then select TO (Takeoff). The CDU calculates three speeds from your weight and runway:

V1
Decision speed — above this you are committed to flying even if an engine fails.
VR
Rotation speed — when to pull the sidestick back to lift the nose.
V2
Safe climb speed after engine failure.

Engine start & taxi

The A380 has four engines, all started using compressed air from the APU (a small jet engine in the tail). Engine start is managed from the overhead panel and monitored on the ECAM ENG page.

Starting the APU

1
APU MASTER → ON
On the overhead panel, find the APU section. Move the APU MASTER switch to ON. Wait a couple of seconds.
2
APU START
Press the APU START button. You will hear the APU spinning up. The SD automatically switches to the APU page so you can monitor it.
3
Wait for AVAIL
When the APU N1 speed reaches 100% and the display shows AVAIL, the APU is ready. This takes 30–60 seconds.

Starting the engines

Start sequence: 2 → 3 → 1 → 4 (inner engines first to minimise jet blast risk at the gate).

1
ENG MODE → IGN/START
On the overhead ENGINE section, set the ENG MODE switch to IGN/START.
2
Engine 2 MASTER → ON
Lift and move the Engine 2 MASTER switch to ON. Watch the ECAM ENG page: N2 rises first, then EGT climbs as fuel ignites, then N1 follows. When N1 stabilises and start indications clear, Engine 2 is running.
3
Repeat for 3, 1, 4
Repeat the same process for Engine 3, then 1, then 4.
4
ENG MODE → NORM
Once all four engines are running, set ENG MODE back to NORM. You can now shut down the APU if desired.

Before taxi

  • Set your squawk code — CDU → SURV — enter 4-digit code and set mode to ALT
  • Check the ECAM WHEEL page — all gear uplocks green, all doors closed
  • Set flaps for takeoff — CONF 1+F or CONF 2 depending on runway
  • Arm ground spoilers — move the speedbrake lever to ARM

ETACS taxi camera

The A380 has a real-world camera mounted beneath the fuselage called ETACS (External and Taxiing Aid Camera System). It shows what is directly under the aircraft — very useful for judging clearance at tight gates. Select it from the ECAM Control Panel to display the view on the SD screen.

BTV — Brake to Vacate setup

Before you leave the gate, you can pre-select which runway exit you want to use at your destination. When the airport ground map (OANS) is shown on the ND, select your target exit from the list. The BTV system stores this and automatically applies the correct braking on landing so you roll out to that exact exit — no manual braking needed. More on using BTV in Chapter 8.

Takeoff & climb

The A380 uses fly-by-wire: your sidestick sends commands to a flight control computer rather than moving surfaces directly. The computer prevents you from exceeding structural limits, making the aircraft very stable but slightly different from smaller planes.

FCU setup before takeoff

Speed
Push the speed knob inward to select MANAGED mode — the window shows dashes ---. The computer picks the optimal speed for each phase automatically.
Heading
Dial in your runway heading, or push the knob for MANAGED mode to follow the flight plan.
Altitude
Dial in your initial cleared altitude. Do not pull the knob yet — this arms it.

Thrust detents

TOGA
Maximum takeoff / go-around thrust. Use when full power is required.
FLEX
Reduced takeoff thrust, calculated to save engine wear. The standard setting for most takeoffs. Your FLEX temperature is calculated on the EFB Performance page.
CL
Climb thrust — used after gear retraction.

For takeoff: advance the levers to FLEX (or TOGA). Auto-thrust arms itself automatically.

Calibrating hardware throttles (EFB)

If you fly with a physical throttle (a HOTAS or a dedicated Airbus throttle quadrant), it needs to be calibrated so your hardware positions line up with the aircraft's virtual detents — IDLE, CL, MCT/FLEX, and TOGA. This matters because the A380's auto-thrust is detent-based: a lever resting even slightly outside the CL detent will disconnect A/THR. Without calibration, your hardware "click" positions won't land where the aircraft expects them.

The current method uses the aircraft's EFB throttle calibration page:

1
Open the EFB throttle calibration page
On the EFB tablet, go to the settings / throttle calibration section. It shows a live readout of where the sim currently thinks each lever sits.
2
Set the detent positions
Move your hardware lever to each physical stop in turn — full idle, then the climb (CL) position, then MCT/FLEX, then full forward (TOGA) — and capture each one so the EFB maps that hardware position to the matching virtual detent.
3
Save and test
Save the calibration, then sweep the lever through its range and confirm the on-screen detent indication (and the FMA) reacts at the right spots — CL gives climb thrust, the TOGA gate registers full thrust, and resting in CL keeps A/THR engaged.
The calibration is stored per aircraft — if you fly a different A380 livery or variant from the hangar, check that the throttle still behaves correctly and re-calibrate if needed. A lever that won't sit cleanly in CL is the most common cause of A/THR dropping out unexpectedly — see the Auto-thrust in depth page for why.
Flying with the keyboard or a simple controller? You don't strictly need to calibrate — you can use the assigned "set throttle to detent" key bindings instead, which jump straight to each detent without a physical lever.

The takeoff roll

  • At V1 — do not abort. You are committed to flying.
  • At VR — gently pull the sidestick back. Aim for 10–12° nose-up attitude. Follow the green flight director bars on the PFD.
  • At V2 — maintain this speed or above for best engine-failure climb performance.

After liftoff

1
Gear UP
Raise the gear handle when you have a positive rate of climb. The ECAM briefly shows the WHEEL page confirming gear retraction.
2
Flap retraction schedule
At the S speed marker on the PFD speed tape → retract to Flaps 1. At the F speed marker → retract to Flaps 0 (clean). These speeds are pre-calculated from your weight.
3
Engage autopilot
Press AP1 on the FCU once above 100 feet in a stable climb. The PFD top strip shows AP1 in green.
4
Engage auto-thrust
Move the thrust levers to the CL detent, then press A/THR on the FCU. The label A/THR appears on the PFD.
As you climb through approximately FL280–FL310, the computer transitions automatically from climbing at a fixed airspeed (knots) to a fixed Mach number. This is fully automatic — you do not need to do anything.
Curious what the green words across the top of the PFD mean? The FMA & autopilot modes page decodes every one.

Cruise

Once levelled off at cruise altitude, the autopilot and auto-thrust manage everything. Your job is to monitor the systems, update the flight plan if needed, and prepare for descent in advance.

The ECAM Cruise page

Shortly after gear retraction in climb, the SD automatically switches to the CRUISE page. It shows two areas:

  • Left — Fuel: fuel flow for each engine (kg/h) and total fuel used since engine start. Cross-check these against your fuel plan occasionally.
  • Right — Air: Cabin Altitude (CAB ALT), pressure differential (DELTA P), and target cabin temperatures for cockpit, passenger decks, and cargo.
A CAB ALT reading of 6,000–8,000 feet is completely normal at cruise — even at 40,000 feet. The pressurisation system maintains comfortable cabin conditions automatically.

The ND map in cruise

Your route continues as a magenta line. Watch for two important markers:

T/D
Top of Descent marker — the point where you should start going down. The CDU PERF DES page shows predicted time and distance to T/D.
ETP
Equal Time Point — if you set one up in the CDU, a ring marker shows the point where flying back or continuing forward takes equal time. Useful for oceanic operations.

Step climbs

On long flights the aircraft becomes lighter as fuel burns off, allowing it to fly more efficiently at a higher altitude. Step climbs are mid-flight altitude increases — typically 2,000 feet at a time. To plan one: CDU → VERT REV on a cruise waypoint → STEP ALTS. When you reach the step point, dial the new altitude on the FCU and the autopilot climbs automatically.

Traffic & weather on the ND

Both are off by default. To enable:

  • Traffic — press the TRAF button on the EFIS panel (left of the FCU). Other aircraft appear as symbols on the ND. TCAS collision warnings remain active regardless.
  • Weather — press the WX button on the EFIS panel. Weather radar overlay appears on the ND.

Descent planning & approach preparation

Good approach preparation starts 20–30 minutes before the T/D marker — well before you start going down. The A380 approach system is highly automated but needs the right data entered in advance.

Step 1 — Get the destination weather

Listen to the ATIS (Automatic Terminal Information Service) at your destination — a recorded broadcast with active runway, wind, visibility, QNH pressure setting, and conditions. Note the active runway and QNH; you will need them shortly.

Step 2 — Set up the arrival procedure

On the CDU F-PLN page, press the button next to your destination airport → ARRIVAL. Select:

  • Runway — the active runway from the ATIS
  • STAR — Standard Terminal Arrival Route — the routing from cruise airspace to the approach
  • Approach — the type of approach, e.g. ILS 27L

Press INSERT to confirm. The STAR and approach legs appear on the ND map.

Step 3 — PERF APPR page

CDU → PERFAPPR.

QNH
Enter the destination QNH from the ATIS. Example: 1013.
LANDING CONF
Your planned flap setting. CONF FULL is standard for most arrivals.
VAPP
The computer shows your final approach speed in green. For a typical landing weight this is around 137–145 knots. No action required — just check it.
DH / MDA
Your decision height as published on the approach chart.

Step 4 — Enable the ILS display

The CDU auto-tunes the ILS frequency when you selected the approach. To display the ILS needles on the PFD, press the LS button on the EFIS panel (left of the FCU). Two extra scales appear on the PFD: a vertical scale for glideslope and a horizontal scale for localizer.

Initiating the descent

The aircraft will not start descending on its own at T/D — you must command it.

1
Receive descent clearance
Get clearance from ATC, or descend at T/D if flying without ATC.
2
Dial down the FCU altitude
Rotate the ALT knob to your cleared descent level.
3
Pull the ALT knob
Pulling selects Open Descent mode. The autopilot descends at idle thrust, following the computed profile downward.

Approach & landing

The approach phase is where everything comes together. The autopilot manages runway alignment and glidepath while the flight computer manages speed through each flap setting. Your job is to monitor, configure, and be ready to intervene.

Approach phase activation

Activates automatically when two conditions are met together: you are within approximately 7,200 feet above the destination's elevation AND the flight plan is being tracked in NAV or LOC mode. You can also activate manually: CDU → PERF → APPR → ACTIVATE APPR PHASE.

Flap extension — managed speed

In managed speed mode the aircraft follows a defined sequence tied to flap position. Speeds appear as coloured markers on the PFD speed tape.

Clean
Maintain above GREEN DOT speed (minimum clean manoeuvring speed).
CONF 1
Managed speed drops to S speed.
CONF 2
Managed speed drops to F speed.
CONF 3 / FULL
Managed speed drops to VAPP — typically 137–145 knots.

Gear down

Lower the gear when established on the approach, typically at or before 4 nautical miles from the threshold. The ECAM automatically shows the WHEEL page — confirm three green gear symbols.

ILS capture

With AP1 engaged and approach armed (press APPR on the FCU):

  • LOC captures first as you intercept the extended runway centreline — the PFD shows LOC in green.
  • G/S captures as you cross the glideslope beam, typically 4–5 nm out — the PFD shows G/S in green.

The aircraft then tracks the ILS beam automatically, descending and following the centreline.

BTV — Brake to Vacate

If you pre-selected an exit in Chapter 4, BTV is now ready. After touchdown it applies the brakes automatically to bring you to taxi speed exactly at your chosen exit. No manual brake input needed. BTV disengages automatically once you vacate the runway.

Manual landing technique

Disengage the autopilot at any point — many pilots disconnect around 500 feet AGL. Auto-thrust can remain on.

  • At approx. 50 feet — begin the flare: gently raise the nose by 2–3°
  • At approx. 30 feet — reduce thrust to idle
  • On touchdown — ground spoilers deploy automatically (if armed); apply reverse thrust; use normal braking

Go-around

If you decide not to land at any point during the approach:

1
Thrust levers → TOGA
The aircraft immediately commands a climb pitch. The autopilot transitions to SRS mode targeting V2+10 for a safe climb.
2
Retract flaps to CONF 3
Do not go clean immediately — CONF 3 is the first retraction step.
3
Gear UP (positive climb)
Confirm a positive rate before raising the gear.
4
Follow ATC for re-sequencing
Re-enter the approach sequence as instructed.

After landing & shutdown

After a long flight, the shutdown process is straightforward. The main steps are parking safely, shutting down the engines, and optionally returning to cold and dark.

Clearing the runway

  • BTV disengages automatically once you clear the runway
  • Apply parking brake briefly if you need to stop and configure before taxiing
  • Retract flaps to 0 using the flap lever
  • Confirm taxi clearance with ATC if on a network

Taxiing to the gate

Taxi at 10–15 knots on straight sections, slower on turns. Select ETACS on the ECAM for the belly camera view — especially useful for judging clearance near the jetbridge and ground equipment as you enter the stand.

Engine shutdown

1
Set parking brake
Once stopped on the stand markings, set the parking brake.
2
Connect ground power
EFB → Ground Services → connect GPU. On the overhead ELEC panel, press EXT PWR to accept. This takes the electrical load off the engines.
3
Engine MASTER switches → OFF
Move all four engine master switches to OFF. All engines spool down over about 30 seconds.

APU shutdown

1
APU BLEED → OFF
Turn off APU bleed air first (overhead panel).
2
APU MASTER → OFF
The APU cools for approximately 60 seconds before fully stopping. The ECAM APU page appears during shutdown and clears when done.

Full cold & dark

To leave the aircraft completely powered off:

  1. Turn all three ADIRS / IRS knobs to OFF
  2. Turn off BAT 1 and BAT 2

All screens go dark. The aircraft is cold and dark again.

In the simulator you do not need to run the full shutdown every session. Saving and exiting with engines off is sufficient. The full shutdown is useful for practising a realistic turnaround.

Quick reference — full flow

A condensed checklist covering all nine chapters in sequence. Use it as a reminder once you know the procedures.

Cold & dark → ready to taxi
BAT 1 + BAT 2 → ON
EFB → Ground Services → GPU connect → EXT PWR ON
ADIRS × 3 → NAV (wait ~11 min for alignment)
CDU → INIT → FROM/TO, CRZ FL, Cost Index
CDU → FUEL&LOAD → ZFW, BLOCK
CDU → F-PLN → SID, route, STAR, approach
CDU → PERF TO → check V1 / VR / V2
APU MASTER ON → APU START → wait AVAIL
ENG MODE → IGN/START → MASTER 2, 3, 1, 4 → ON → ENG MODE → NORM
Transponder squawk set, flaps set, spoilers ARM
Parking brake RELEASE → taxi to runway
Takeoff
FCU: speed MANAGED (---), heading set, altitude set
Thrust levers → FLEX or TOGA
At VR: sidestick back to 10–12°
Positive rate → gear UP
S speed → Flaps 1, F speed → Flaps 0
AP1 ON, levers to CL detent, A/THR ON
Cruise monitoring
Check ECAM CRUISE page — fuel flow, cabin altitude
ND: TRAF ON, WX ON as desired
CDU: check predicted fuel at destination vs. minimum
Descent prep (20–30 min before T/D)
Get destination ATIS — runway, QNH, conditions
CDU F-PLN → ARRIVAL → runway, STAR, approach → INSERT
CDU PERF APPR → QNH, CONF, check VAPP
LS button ON (EFIS panel) — ILS needles appear on PFD
FCU: dial down altitude → pull ALT knob → open descent
Approach
FCU: press APPR to arm approach modes
Extend flaps in stages: CONF 1 → 2 → 3 / FULL
Gear DOWN before 4 nm — check ECAM WHEEL page (3 green)
LOC + G/S capture → autopilot tracks ILS
Touchdown → spoilers auto, reverse thrust, BTV brakes
Shutdown
Parking brake SET at stand
EFB → GPU connect → EXT PWR ON
ENG MASTER 1, 2, 3, 4 → OFF
APU BLEED OFF → APU MASTER OFF
ADIRS × 3 → OFF → BAT 1 + BAT 2 → OFF (cold & dark)

Frequently asked questions

Common questions answered in plain language. Click any question to expand it.

First steps

Why are all the screens dark when I load in?

This is intentional. When you spawn cold and dark at a gate, the plane has no electrical power — just like the real aircraft parked overnight. Turn on the batteries and external ground power on the overhead panel to bring everything to life.

The screens did a green flash when I powered up. Is something wrong?

Completely normal. The safety test overlay is a brief green message that appears on the PFD, ND, EWD and SD right after the batteries come on. It simulates the real aircraft's built-in test and clears on its own after a few seconds.

The map shows "ALIGN" and red flags. What do I do?

Turn the three IRS knobs on the overhead panel to NAV. Alignment takes about 11 minutes from cold and dark. Until it finishes, the map is blank and some PFD indicators show red flags — this is correct. If you spawned on a runway or in the air, the IRS pre-aligns automatically.

Flight planning & setup

How do I load a flight plan into the CDU without typing every waypoint?

There are three common ways, and which you use depends on your simulator version: (1) SimBrief import via the aircraft EFB — works on both sim versions; (2) on MSFS 2020, build the plan on the sim's world map and it loads into the CDU automatically when you spawn; (3) on MSFS 2024, build the plan in the native FS2024 EFB and it loads into the CDU. Chapter 3 walks through all three step by step.

How does SimBrief import work?

SimBrief is a free online flight planner (part of Navigraph). Generate your OFP on simbrief.com first, then open the SimBrief / import page on the aircraft EFB and enter your numeric SimBrief Pilot ID (found in your SimBrief account settings). The EFB fetches your latest OFP and imports the route — waypoints, airways, SID, STAR — plus cruise level and cost index, and can pre-fill the fuel and payload. It works the same way on both FS2020 and FS2024.

I made a flight plan on the MSFS 2020 world map — is it already in the aircraft?

Yes. On MSFS 2020, a flight plan built on the world map (departure, arrival, runway, SID, STAR, or a loaded .pln) is automatically loaded into the CDU when you spawn into the A380. Check the F-PLN page and the ND after loading in — world-map routes are sometimes simplified, so you may want to refine the SID, STAR, and approach in the CDU.

I'm on MSFS 2024 and my world-map plan didn't load. What do I do?

FS2024 changed the workflow. Instead of the world-map-to-CDU spawn behaviour, MSFS 2024 uses its own built-in native EFB (the simulator's EFB, separate from the aircraft tablet) to build the flight plan — and a plan made there loads into the A380 CDU. So on FS2024, build or adjust your route in the native FS2024 EFB. (SimBrief import via the aircraft EFB also works on FS2024.) Caveat: the EFB plan only transfers into the CDU correctly once you have actually spawned into the aircraft — make sure the flight has loaded and you're in the cockpit before expecting the route in the FMS. If it looks wrong, give it a moment after spawn and re-check the F-PLN page.

Do I need to calibrate my hardware throttle, and how?

If you fly with a physical throttle, yes — it should be calibrated so your hardware positions line up with the virtual detents (IDLE, CL, MCT/FLEX, TOGA). The A380's auto-thrust is detent-based, so a lever sitting even slightly outside CL will disconnect A/THR. Use the EFB throttle calibration page: move the lever to each detent in turn and capture it, then save and test against the FMA. The calibration is stored per aircraft, so re-check it if you switch livery or variant. Keyboard/simple-controller users can use the "set throttle to detent" key bindings instead. Chapter 5 has the full procedure.

My auto-thrust keeps disconnecting on its own — why?

The most common cause is a hardware throttle lever resting just outside the CL detent band, which disconnects A/THR. Calibrate your throttle on the EFB so CL is a clean, repeatable position. Any time the A/THR label disappears from the PFD without you pressing the button, check the lever positions first.

The map (ND)

I can't see any traffic on the map.

Press the TRAF button on the EFIS panel (left of the FCU). Traffic display is off by default. The TCAS collision avoidance system is always active regardless — you still get audio warnings.

Why doesn't the weather radar show on the map?

Press the WX button on the EFIS panel. Weather is off by default. This controls whether weather is drawn on the map — the underlying weather system has a separate power switch on the overhead panel (SURV section).

What is the dashed circle around my aircraft?

That is the Energy Circle. It shows roughly how far the aircraft needs to fly to descend from its current altitude to landing. If your destination is inside the circle you may need to start descending sooner. It only appears within 180 nautical miles of your destination.

What are T/C, T/D, and DECEL on the route?

These are computed flight path markers: T/C = Top of Climb (where you reach cruise altitude), T/D = Top of Descent (where to start going down), DECEL = where to begin slowing for the approach, S/C = a speed restriction point. The FMS / CDU deep dive explains why they move.

ECAM pages (SD)

How do I change which system page is shown on the lower screen?

Use the ECAM Control Panel (ECP) — the panel with labelled buttons below the SD. Each button calls up that system page. The ALL button cycles through all pages one at a time.

The lower screen keeps switching pages on its own. Why?

The ECAM shows the most relevant page automatically: DOOR at the gate, WHEEL during takeoff/landing roll, CRUISE once airborne with gear up, APU during APU start/shutdown, and the relevant system page for any active warning. You can override it manually at any time.

What is "CAB ALT" on the pressurisation page?

Cabin Altitude — how high the air pressure inside feels to passengers. Flying at 40,000 feet, the cabin is typically pressurised to 6,000–8,000 feet equivalent. A reading in that range is completely normal. It is only a problem above ~10,000 feet.

Autopilot & auto-thrust

How do I engage the autopilot?

Press AP1 or AP2 on the FCU. It only engages if the aircraft is in a stable state — generally above 100 feet after takeoff. A green AP1 or AP2 indicator appears on the PFD to confirm.

What is the difference between managed and selected speed?

Managed speed (FCU window shows ---) means the computer picks the most efficient speed for the current flight phase. Selected speed means you dial in a specific speed manually with the FCU knob, overriding the computer.

The plane pitched up uncontrollably when hand-flying. Is that a bug?

This was a known issue with the pitch trim system that has been fixed. The current build is stable and neutral in pitch during manual flight.

Approach & landing

The ILS needles don't show on the PFD.

Two things are needed: (1) The ILS frequency must be tuned — the CDU does this automatically when you select an ILS approach. (2) Press the LS button on the EFIS panel to enable the ILS scale on the PFD. Without pressing LS the needles stay hidden even if tuned.

What is BTV and how do I use it?

BTV (Brake to Vacate) lets you choose a runway exit and the system brakes automatically to reach taxi speed exactly at that exit. Select your exit on the ND airport map (OANS) before departure. BTV activates on touchdown and releases once you clear the runway.

Advanced systems

Deeper dives into the automation behind the A380. Where the Beginner guide tells you which buttons to press, these pages explain what the systems are actually doing — so you can read the aircraft instead of just operating it. Best tackled once you are comfortable flying a full route.

Flight Mode Annunciator (FMA)

The FMA is the single most important read-out in the cockpit during automated flight. It is a narrow strip at the very top of the PFD that tells you exactly what every automation system is doing at any given moment. Misreading it — or ignoring it — is the root cause of most unexpected automation behaviour.

What is the FMA?

Every time you press a button on the FCU, move a knob, or the aircraft transitions through a flight phase, the autopilot and auto-thrust change their active modes. The FMA tells you what those modes are in real time. Real-world Airbus doctrine requires pilots to call out every FMA change — "Speed, Climb, Nav" — to confirm the automation did what was expected and nothing unexpected.

As a simmer, developing the habit of glancing at the FMA after every FCU input is the single biggest upgrade you can make to your scan.

The golden rule: after any FCU action, confirm the FMA changed to what you expected before moving on. If it didn't, the aircraft did not do what you think it did.

The 5 columns — anatomy

The FMA strip is divided into five columns by thin vertical divider lines. Reading left to right:

SPEED ALT NAV DES (armed) AP1 FD A/THR CRUISE STATE EXAMPLE AUTO-THRUST What A/THR is commanding Column 1 VERTICAL MODE How AP manages pitch / altitude Column 2 LATERAL MODE How AP manages heading / roll Column 3 ARMED MODES Modes ready to activate automatically Column 4 AP/FD STATUS What automation is engaged Column 5 ← Automation function ──────────────────────────────────── Engagement status → Columns 1–3 show what the system IS doing · Column 4 shows what it WILL do next · Column 5 shows what IS on Green = active mode · Cyan = armed mode · White = status indicator
FMA strip as shown at the top of the PFD — cruise state with AP1 and A/THR engaged

Colour code

Every text element on the FMA has a specific colour with a specific meaning. You should recognise these without having to think:

GREEN
Active — the system is doing this right now
CYAN
Armed — will activate when conditions are met
WHITE
Status display — FD bars, AP/FD labels
AMBER
Caution — mode degraded or unusual state
MAGENTA
FLS approach mode (non-ILS precision)
GREY
A transient — mode just changed (flashes briefly)
When a mode transitions from armed to active, the new mode flashes green for several seconds before going steady. This is intentional — it demands your attention that something changed.

Column 1 — Auto-thrust modes

The leftmost column tells you what the auto-thrust system is commanding. There is a crucial distinction between thrust law (A/THR is controlling engine output directly) and speed law (A/THR is maintaining a target speed by adjusting thrust continuously).

FMA textWhat it meansWhen it appears
SPEEDSpeed law — A/THR adjusts thrust to hold a managed or selected speed target. This is the normal cruise and approach state.Cruise, approach, whenever speed is managed
MACHSame as SPEED but using Mach as the reference. Replaces SPEED above the IAS/Mach crossover altitude.High-altitude cruise (roughly FL280+)
THR CLBThrust law — A/THR commands climb thrust rating. The autopilot manages pitch to chase speed; A/THR is pinned at CLB thrust.Managed climb. Expect speed to wander slightly.
THR IDLEThrust law — A/THR commands idle thrust. Aircraft descends or decelerates under autopilot pitch control.Open descent (OP DES), managed descent (DES) path-following
THR MCTMaximum continuous thrust — used as the upper limit during single-engine operations.Engine-out scenarios
THR TOGAFull takeoff/go-around thrust commanded.Takeoff roll, go-around initiation
THR FLEXReduced (flex) takeoff thrust. Calculated from your FLEX temperature entry on the EFB.Takeoff with flex thrust selected
A.FLOORAlpha-floor protection — angle of attack exceeded a threshold. A/THR commanded to TOGA regardless of any other selection. Amber.Stall protection activation. Demands immediate attention.
TOGA LKA.FLOOR has triggered and locked TOGA thrust. Thrust cannot be reduced until the pilot explicitly disconnects A/THR and re-engages.After A.FLOOR — thrust is frozen at TOGA
RETARDA/THR commands thrust reduction to idle — used during flare. Flashes briefly.Last ~20 ft during autoland flare
THR CLB vs SPEED — when you see THR CLB, the thrust is fixed at climb rating and the AP adjusts pitch to achieve speed. If the aircraft pitches steeply or speed drops in climb, it is working correctly. When you see SPEED, the thrust is variable and pitch is controlled separately. Confusing the two leads to misidentifying an automation problem that does not exist.

Column 2 — Vertical modes

This column shows how the autopilot is managing pitch and altitude. Vertical modes fall into two families: managed (the FMS chooses the target) and selected (you dialled a target on the FCU).

FMA textWhat it meansNotes
SRSSpeed Reference System — targets V2+10 kt on takeoff. Keeps the aircraft at the best climb-out speed even if an engine fails.Active from liftoff to acceleration altitude
CLBManaged climb — FMS-computed optimal climb profile. A/THR stays at THR CLB; AP adjusts pitch.After SRS clears, aircraft climbs per FMS speed schedule
OP CLBOpen climb — you pulled the ALT knob. AP pitches up at whatever speed is selected/managed until the FCU altitude.Selected mode — no FMS involvement
ALTLevel off — aircraft is holding the FCU altitude. Slight pitch variations to maintain exactly.At any cruising altitude or intermediate level
ALT*Altitude capture — about to level off. Flashes briefly as the aircraft pitches toward level. Transitions to ALT.Short-lived transient — normal
ALT CRZCruise altitude hold — same as ALT but specifically at the CDU cruise flight level. Applies minor speed corrections to maintain.At the programmed cruise FL
DESManaged descent — FMS follows the computed VNAV path. AP commands idle thrust or small corrections to stay on the path gradient.Managed descent after T/D when path is valid
OP DESOpen descent — you pulled the ALT knob below current altitude. AP flies idle thrust and descends at managed speed.Selected descent — faster, ignores FMS constraints
V/SVertical speed hold — AP maintains a pilot-selected rate in ft/min.When you push the V/S knob after setting a rate
FPAFlight path angle hold — AP maintains a selected geometric angle in degrees. Replaces V/S in TRK-FPA mode.FCU in TRK/FPA mode
G/SGlideslope tracking — AP is following the ILS glidepath. One of the most critical modes to confirm before final.After G/S capture on ILS approach
G/S*Glideslope intercept — about to capture the beam. Flashes then transitions to G/S.Short-lived as the beam is acquired
FLAREAutoland flare mode — pitch raised to arrest descent rate over the runway.Last 50 ft, autoland only
ROLLOUTPost-touchdown autoland — AP keeps the aircraft straight on the runway centre line.After touchdown, autoland
SRS GAGo-around speed reference system — targets a safe go-around climb speed.After TOGA pushed on go-around

Column 3 — Lateral modes

FMA textWhat it meansNotes
NAVManaged lateral — AP follows the FMS flight plan. The most common cruise mode. Aircraft banks to track each waypoint.Normal en-route and STAR tracking
HDGHeading hold — AP flies the heading dialled on the FCU. You are responsible for sequencing waypoints.Selected mode. FCU window shows a heading value.
TRACKSame as HDG but holds a true track over the ground rather than magnetic heading. Used in TRK-FPA FCU mode.TRK/FPA mode selected on FCU
LOCLocalizer tracking — AP is following the ILS lateral beam, keeping the aircraft on the runway centreline extended.After LOC capture. Confirm before disconnecting AP.
LOC*Localizer intercept — acquiring the beam. Flashes then transitions to LOC.Short transient as centreline is captured
RWYRunway tracking on takeoff — AP aligns with the runway heading based on the programmed departure runway.Early climb, before NAV or HDG mode takes over
RWY TRKRunway track after liftoff — same idea as RWY but with slight wind correction to track the runway centreline over the ground.Low altitude climbout
GA TRKGo-around track — AP holds the heading that existed at the moment TOGA was pushed. Prevents oscillation during the initial climb-out.Immediately after go-around initiation

Column 4 — Armed modes

Armed modes appear in cyan. They are not active yet — they are waiting for a condition to be met, at which point they automatically transition to active (green). This column can show both a vertical armed mode and a lateral armed mode simultaneously.

Understanding armed modes is key to understanding why the aircraft sometimes does something you didn't explicitly command — you armed it earlier and it just triggered.

ALT
An altitude is dialled on the FCU. The aircraft will capture and level off at that altitude automatically. Always shown when climbing or descending toward an FCU altitude.
CLB
Managed climb is armed but not yet active — typically during takeoff SRS phase. Will replace SRS once the acceleration altitude is reached.
DES
Managed descent path is computed and ready. Will activate when the aircraft reaches the T/D point and begins the descent.
NAV
NAV will engage once the aircraft is established on the departure track. Common on takeoff when HDG or RWY is the active lateral mode.
LOC
Localizer beam capture is armed. Will activate when the aircraft intercepts the ILS centreline. Requires APPR pressed on the FCU.
G/S
Glideslope capture armed. Will activate after LOC is captured and the aircraft intercepts the glidepath from below.
LAND
Full autoland is armed — two APs engaged, conditions met. The aircraft will complete the landing automatically.
FLARE
Autoland flare sequence is armed. Activates at roughly 50 ft radio altitude.
ROLLOUT
Post-touchdown runway tracking armed. Activates at touchdown during autoland.
After pressing APPR on the FCU, you should see LOC and G/S appear in cyan in column 4 simultaneously. If you only see one or neither, something is missing — check that the approach is programmed in the CDU and that an ILS frequency is tuned.

Column 5 — AP/FD status

The rightmost column shows which guidance systems are physically engaged. Unlike the other columns it doesn't describe what the autopilot is doing — it shows what is on.

AP1 / AP2
Autopilot 1 or 2 is engaged and actively flying the aircraft. Both can be engaged simultaneously for CAT3 autoland — the second AP serves as a monitor. In normal single-AP flight you will only see AP1.
FD
Flight Director is on but autopilot is off. The green FD bars appear on the artificial horizon to guide the pilot's manual inputs — the computer tells you where to fly; you do the flying. White text (not green) because it is a status, not an active mode.
A/THR
Auto-thrust is engaged and controlling the throttle. Green when active and doing something. If it disappears, thrust control reverts to the physical lever positions.
1FD2
Both flight directors are active (Captain's FD = 1, First Officer's FD = 2). Seen when AP is off but both FD systems are computing guidance.
A/THR disappearing from Col 5 — if A/THR vanishes from the FMA while you didn't press the A/THR button, check the thrust levers. The most common cause is accidentally bumping a lever outside the CL detent range, which disconnects auto-thrust. The levers control auto-thrust engagement in this aircraft, not just thrust directly.

Phase-by-phase FMA states

Here is what you should expect to see on the FMA at each phase of a typical flight. If your FMA shows something different, something is either wrong or you have selected a mode you did not intend to.

1 — Takeoff (after liftoff, ~200 ft)
THR CLB SRS CLB RWY TRK NAV ALT AP1 FD A/THR
SRS → CLB armed. Thrust at climb rating. AP engaged after 100 ft.
2 — Managed climb
THR CLB CLB NAV ALT AP1 FD A/THR
Thrust pinned at CLB rating. Speed managed by AP pitch. ALT armed for cruise level.
3 — Cruise (managed speed)
MACH ALT CRZ NAV DES AP1 FD A/THR
A/THR varies thrust to hold Mach. ALT CRZ holds cruise FL. DES armed for T/D.
4 — Open descent
THR IDLE OP DES NAV ALT AP1 FD A/THR
Idle thrust, aircraft descends. AP manages speed via pitch. ALT armed for level-off.
5 — ILS approach (established)
SPEED G/S LOC LAND FLARE AP1 AP2 FD A/THR
Both APs on for autoland. G/S + LOC green = beam captured. LAND and FLARE armed.
6 — Go-around (initial)
THR TOGA → SPEED SRS GA GA TRK CLB NAV AP1 FD A/THR
TOGA thrust, SRS GA climbing. GA TRK holds heading. CLB + NAV armed for when established.

Common mistakes & misreadings

1 — Not checking Col 4 after pressing APPR

Pressing APPR on the FCU arms the ILS approach. You should immediately see LOC and G/S appear in cyan in column 4. If they don't, the approach is either not programmed in the CDU or the aircraft is too close to the beam to arm. This needs to be caught before you are in the intercept — not after.

2 — Confusing THR CLB (thrust law) with SPEED (speed law)

In THR CLB the thrust is fixed — the autopilot adjusts pitch to fly a speed. In SPEED the thrust is variable — the thrust adjusts to maintain a speed while pitch is managed separately. If you see the nose pitching significantly in climb, that is normal THR CLB behaviour, not a malfunction. The aircraft is adjusting pitch to hold speed against fixed thrust.

3 — Ignoring mode transitions at level-off

As the aircraft approaches the FCU altitude, you will briefly see ALT* flash green — this means the capture has begun. If ALT* appears but never transitions to ALT, the aircraft has missed the level-off, which usually means you dialled in a new altitude before the previous one was captured. The old target was erased before the aircraft reached it.

4 — Assuming AP is on because the aircraft is flying itself

The Flight Director can fly the bars on the attitude indicator even when the autopilot is off. The FD bars guide your manual flying but do not fly the aircraft. Always confirm AP1 appears in column 5 before assuming the autopilot is in control.

5 — Not noticing when A/THR drops out

If A/THR disappears from column 5 and you do not notice, the engines freeze at whatever position the physical levers are. In cruise this typically means the thrust stays where it was — briefly fine. In descent at idle it means thrust stays at idle after level-off. Speed control is gone. The aircraft will pitch down to maintain speed unless you intervene. The FMA disappearance is the only warning.

6 — Expecting G/S to capture before LOC

The sequence is always LOC first, then G/S. The aircraft intercepts the localizer centreline, then once established on LOC it begins tracking the glideslope from below. If you see G/S armed but LOC has not yet captured, G/S will not activate yet — this is correct. Attempting to hand-fly the glidepath before LOC is captured is a common reason for unstabilised approaches.


FMS / CDU deep dive

The Flight Management System is the brain of the aircraft's automated flight. Everything the autopilot, auto-thrust, and ECAM use for predictions — speeds, altitudes, times, fuel — comes from the FMS. The CDU is the interface to that brain. Understanding what happens behind the scratchpad changes how you read the aircraft's behaviour.

What the FMS actually does

The FMS is not just a moving-map route planner. It is simultaneously doing four things at all times:

Navigation
Computes current position from IRS data, GPS, and radio navaids. Calculates cross-track error, bearing to the next waypoint, and lateral steering commands to the autopilot.
Performance
Using your weight, cost index, and atmospheric conditions it continuously computes the optimal speed, altitude, and thrust setting for each phase. This is the engine behind managed speed.
Predictions
Calculates estimated time of arrival and fuel remaining at every waypoint in the plan, continuously updating as the flight progresses. The ETA and EFOB you see on the F-PLN page are live predictions.
Guidance
Outputs lateral and vertical guidance commands to the autopilot. When the AP is in NAV or DES mode it is following the FMS output, not doing its own path calculation.
Because the FMS drives the predictions, any incorrect data entry — wrong ZFW, wrong fuel block, wrong CRZ FL — cascades into wrong ETAs, wrong EFOB, wrong managed speeds. Garbage in, garbage out.

CDU anatomy

The CDU face has three distinct zones. Understanding the zones tells you how to interact with it without hunting for keys.

INIT 1/2 FROM/TO COST INDEX EGLL/KJFK 30 ALTN CRZ FL/TEMP EGCC 370/M-56 IRS INIT TROPO [ ] 36090 FLT NBR LAT/LONG EK001 N51.5/W000.2 DATE OPT FL / MAX FL 20JUN26 358 / 400 _ INIT FUEL F-PLN PERF SURV DATA MENU DIR HOLD PROG SEC ATC A B C D E F G H I J K L M N O P Q R S T U V W X Y Z SP 1 2 3 4 5 6 7 8 9 0 . / ± CLR DEL ENTER SCREEN Title + 6 data rows + scratchpad LSK / RSK 6 buttons per side — select adjacent field FUNCTION KEYS Jump to major pages KEYPAD Type into scratchpad SCRATCHPAD Type here, then press an LSK/RSK
CDU face — INIT page A loaded, showing the three interaction zones

Colour code on the screen

CYAN
Field labels — the small text above each data entry. Not interactive.
GREEN
FMS-computed or confirmed data. The FMS has this value and is using it.
AMBER
Data required — this field must be filled before the FMS can function correctly. A box [ ] means entry needed.
WHITE
Scratchpad content, or a value you are in the process of entering.
MAGENTA
FMS-recommended value (e.g. optimal FL, computed VAPP) — you can accept it by pressing the adjacent LSK/RSK.

The scratchpad workflow

Every data entry on the CDU follows the same pattern, no exceptions. Understanding this prevents 90% of CDU confusion:

  1. Type your value using the keypad — it appears in the scratchpad at the bottom of the screen. The rest of the screen is unchanged.
  2. Press the LSK or RSK adjacent to the field you want to fill. The value moves from the scratchpad into that field.
  3. The FMS validates it — if the entry is valid, the field turns green and the scratchpad clears. If invalid, the scratchpad shows an error message like NOT ALLOWED or FORMAT ERROR.
To delete a value from a field: press CLR once (scratchpad shows "CLR"), then press the LSK/RSK next to the field you want to clear. To delete a character you are typing, press CLR without pressing any LSK/RSK.
If you press an LSK while the scratchpad is empty, most pages copy the field's current value back down into the scratchpad so you can edit it in place. This is the quickest way to modify an existing entry.

INIT page — the cascade anchor

The INIT page establishes the fundamental parameters that every other calculation in the FMS depends on. Enter it wrong and every downstream number — predicted fuel, ETAs, managed speeds — is wrong.

FieldWhat it doesWhat to enter
FROM/TOSets the departure and destination airports. The FMS uses these to anchor the route, automatically pre-select ILS frequencies near the destination, and set transition altitudes.EGLL/KJFK — ICAO codes separated by a slash. Mandatory first entry.
ALTNThe alternate airport for fuel planning. The FMS reserves enough fuel to fly from destination to alternate in the EFOB calculation.Alternate ICAO. If omitted, no alternate fuel is reserved — dangerous for real-world planning.
COST INDEXThe single most important performance parameter. Balances time cost vs fuel cost. See the Cost Index section below for full detail.0–999. Typical: 20–60 for long-haul. Higher = faster, more fuel.
CRZ FLInitial cruise flight level. The FMS builds the vertical profile from this — T/C placement, climb speed schedule, and DES profile are all referenced to this altitude.370 for FL370. Can be changed in flight but triggers a profile recalculation.
CRZ TEMPTemperature deviation from ISA at cruise altitude (ISA+N). Affects thrust required and managed cruise Mach. Leave blank to use standard ISA.FMS usually fills this from atmospheric data. Only enter if you have specific SIGMET data.
TROPOTropopause altitude. Affects the IAS/Mach crossover computation. Almost never changed.Default 36,090 ft. Only change with flight planning system output showing a non-standard tropopause.
OPT FL / MAX FLFMS-computed optimal and maximum cruise altitude for your weight. Magenta — these are recommendations, not fields you enter. OPT FL is the most fuel-efficient. MAX FL is the ceiling.Read-only. If your cleared FL is above MAX FL, expect reduced performance.
The IRS INIT field on page 1 pre-positions the IRS to a lat/long you enter if the IRS alignment has not yet completed. In practice, the IRS reads its position from GPS automatically during alignment so you rarely need to fill this manually.

FUEL & LOAD — the weight foundation

Every performance prediction in the FMS is weight-dependent. The FUEL & LOAD page is where you define the weight. Get this wrong and V speeds, managed climb speeds, VAPP, EFOB, and even the optimal FL will all be wrong.

FieldWhat it meansNotes
ZFWZero Fuel Weight — the total weight of the aircraft plus everything in it (passengers, cargo, crew, catering) before any fuel is added. In tonnes.This is the single most important weight entry. A full A380 at max pax is typically 370–390 t ZFW. If the EFB has loaded passengers and cargo, this field pre-fills.
ZFWCGZero Fuel Weight Centre of Gravity — the CG position at ZFW expressed as % MAC (Mean Aerodynamic Chord). Affects trim requirements and VAPP correction.Normal range: 26–40% MAC. Values outside this range need to be flagged. The EFB Mass & Balance page calculates this.
BLOCKTotal fuel loaded in kg. This is the fuel in all tanks at the gate before any taxi burn.Must match what you actually loaded in the EFB or the fuel state page. The FMS uses this to compute EFOB at every waypoint.
TAXIEstimated fuel burned during taxi to the runway. Subtracted from BLOCK to give the Trip Fuel calculation.Typically 500–1,000 kg for a long haul. Affects the EXTRA FUEL display but not the EFOB chain directly.
TOWTakeoff Weight — FMS-computed from ZFW + BLOCK − TAXI. Read-only.Cross-check against your SimBrief OFP TOW. A meaningful discrepancy means something was entered wrong.
GW / CGLive Gross Weight and CG, updated every few seconds from fuel burn. Read-only during flight.Watch this during long cruise — as fuel burns and CG moves, the FMS continuously refines predictions.
The prediction cascade: ZFW → TOW → V speeds → climb speed → managed Mach → EFOB at every waypoint → ETA at every waypoint → VAPP. Every one of these is a function of weight. A 10-tonne ZFW error propagates through every prediction on every page.

F-PLN page — how the route is structured

The F-PLN page is not just a list of waypoints. Each entry is a leg with a specific type, and the type determines how the autopilot flies it. The page also hosts constraints, pseudo-waypoints, and the discontinuity — all of which behave differently from normal waypoints.

F-PLN 1/8 EGLL CRZ FL370 0000 DET2F DETLING BIG 250↓ SILVA -DISCONTINUITY- MIMKU +FL290 (T/C) 3:24 DOLIR (T/D) CAMRN FL100↓ (S/C) 250↓ (DECEL) ILS27L KJFK KJFK EFOB 22.4 ---END OF F-PLN--- Active leg Magenta arrow, green text Speed constraint 250↓ = at or below 250 kt Discontinuity Gap in route — AP will fly direct to next wpt Altitude constraint +FL290 = at or above Pseudo-waypoints (T/C) (T/D) (DECEL) (S/C) Computed, not in navdata EFOB at destination Estimated fuel on board Updates every few secs
F-PLN page showing key entry types — active leg, constraints, discontinuity, pseudo-waypoints

The TMPY F-PLN system

Any modification to the flight plan — inserting a waypoint, changing a SID, adding a direct-to — first creates a temporary copy of the plan. You are editing the TMPY plan, not the active one. This lets you preview changes before committing. The yellow TMPY F-PLN prompt at the bottom right of the CDU appears whenever a temporary modification is pending:

  • INSERT (RSK6 on most pages) — the TMPY plan replaces the active plan. Autopilot immediately follows the new route.
  • ERASE (LSK6) — the TMPY plan is discarded. Active plan unchanged.
While in TMPY, the CDU shows the temporary route in a different colour. If you navigate away from the F-PLN page without inserting or erasing, the TMPY modification remains pending — don't leave it hanging.

Discontinuities

A discontinuity appears in the F-PLN when the FMS cannot connect two consecutive legs automatically — typically after inserting a SID that ends at one waypoint and a route that starts at a different one, or after a DIRECT TO creates a route gap. It is shown as a yellow -DISCONTINUITY- line.

When the autopilot reaches a discontinuity in NAV mode it does not stop — it flies direct to the waypoint immediately after the discontinuity. Depending on the geometry this could be directly ahead, or it could turn the aircraft 180 degrees. Always check the ND map after any plan modification to see what the magenta line does at the discontinuity.

To remove a discontinuity: on the F-PLN page, press the LSK next to the discontinuity line. This connects the two surrounding waypoints with a direct leg.

Altitude and speed constraints

Constraints come from navdata and define what altitude or speed the FMS must achieve at a specific waypoint. They appear in magenta on the F-PLN page and as magenta circles on the ND. The FMS respects these in managed descent — it builds the DES path to satisfy every constraint. In OP DES it ignores them.

250↓
At or below 250 kt at this point. The FMS will slow through this speed before the waypoint.
+FL100
At or above FL100 at this point. Important for obstacle clearance on SID procedures.
FL80
Exactly at FL80 at this point — both AT constraints. The FMS treats this as a hard target.
FL100↓/210↓
Combined altitude and speed constraint at the same waypoint — both must be met.

PERF pages — phase by phase

The PERF key cycles through performance sub-pages matching the current or next flight phase. Each sub-page contains the performance data relevant to that phase. They do not need to all be filled in advance — the FMS activates each one when its phase begins.

PageKey fieldsWhat the FMS does with them
PERF TOV1, VR, V2, FLEX temp, TOGA/FLEX selection, flap configV1/VR/V2 appear as speed bugs on the PFD tape. FLEX temp sets the reduced thrust limit. Without V speeds, the FMS cannot arm SRS mode.
PERF CLBManaged speed target, thrust limit (CLB/MCT/DCL1-3)Sets the climb thrust rating that appears as THR CLB on the FMA. Derate selections reduce climb thrust for noise abatement or engine life.
PERF CRZPredicted TOC, ETA, EFOB at top of climb; step climb planningMonitoring page. No entries required in normal operations. Shows live predictions updating against actual fuel flow and ground speed.
PERF DESPredicted TOD distance/time, EFOB at destinationShows when T/D will be reached. Helpful 20–30 min before descent to confirm the profile is realistic.
PERF APPRQNH, landing flap config, VAPP, DH/MDA, auto-brake modeVAPP is computed as VLANDING + wind correction (1/3 headwind, capped at +15kt, with a minimum floor of VLS). QNH entry updates the altimeter reference for the approach.
VAPP explained: VAPP is not just a number you pick — it is computed from your landing weight via the speed tables, then corrected for wind. If you have a 30-knot headwind, VAPP = VLANDING + 10 kt (1/3 of 30, capped at 15). The FMS also applies a VLS floor so VAPP can never be below the minimum safe speed. Overriding VAPP manually by entering a lower value forces VAPP below what the weight demands — not recommended.

FMS operating phases

The FMS transitions through a defined sequence of operating phases. Each phase changes which managed speed is active, which PERF page is current, and which constraints the FMS respects. Understanding the phase prevents surprises when managed speed changes unexpectedly.

G PREFLIGHT Data entry V speeds IRS align T TAKEOFF SRS targets V2+10 kt THR FLEX/TOGA C CLIMB Econ climb kt Speed constraints apply from navdata R CRUISE ECON or LRC Mach number Step climbs D DESCENT Econ DES kt SPD LIM 250↓ below FL100 A APPROACH VAPP managed Flap schedule auto-activates GA GO-AROUND GA altitude SRS GA speed Thrust set Accel alt T/C reached T/D / descent NAV+<7200ft Phases activate automatically — the CDU changes its managed speed target with each transition APPROACH phase can be activated manually via PERF → ACTIVATE APPR PHASE if the auto-trigger fails
FMS operating phase timeline — each transition changes the managed speed law
Phase transition speeds: When the FMS transitions from CLIMB to CRUISE, managed speed switches from climb schedule (e.g. 310/M.85) to cruise ECON Mach — this is a jump, not a ramp. If your CI is set correctly, it is a small change. With a very high CI the cruise Mach can be noticeably faster than the top of climb speed, causing a brief acceleration after levelling. This is correct, not a bug.

Pseudo-waypoints — what they are and why they move

Pseudo-waypoints appear on the F-PLN page in parentheses — (T/C), (T/D), (DECEL), (S/C). They are not in the navigation database. The FMS computes them continuously from your current weight, wind, speed, and altitude. Because the inputs change constantly, the pseudo-waypoints move.

Pseudo-wptWhat it marksWhy it moves
(T/C)Top of Climb — where the FMS predicts you will reach cruise altitude at the current climb rate and CI. Marked with a white arrow on the ND.Moves earlier if you are climbing faster than predicted, later if slower. Headwinds push it later.
(T/D)Top of Descent — where the FMS predicts descent should begin to arrive at the destination approach altitude via the computed DES profile. Shown as a white downward arrow on the ND.Moves with changes to CRZ FL, destination, winds aloft, and weight (fuel burn). Do not begin descent early just because T/D feels far away — the FMS profile accounts for tailwinds.
(DECEL)Deceleration point — where the FMS computes you should begin slowing from approach speed to VAPP via the flap schedule. Placed before the FAF (Final Approach Fix) or IAF.Moves with changes to VAPP, wind, and landing flap config.
(S/C)Speed Change — a point in climb or descent where a speed restriction from navdata takes effect. For example, the mandatory 250 kt below FL100 is marked here.Fixed to the FL100 crossing point — moves if your vertical profile changes.
The FMS will not begin the descent automatically at T/D. You must command it — either by pulling the ALT knob on the FCU (OP DES) or by pushing it once the FCU altitude is set lower (managed DES, if a valid profile exists). T/D is a marker, not a trigger.

Cost Index — what it actually does

The Cost Index (CI) is the FMS's instruction for how to balance time against fuel. It is not a fuel-saving switch — it is an economic input that shifts the entire speed schedule across all phases simultaneously.

Mathematically: CI = time cost ($/hour) ÷ fuel cost ($/kg). A CI of 30 means your airline values one hour of flight time the same as 30 kg of fuel. A higher CI means time is relatively more expensive, so fly faster. A lower CI means fuel dominates, so slow down.

CI 0
Maximum Range Cruise (MRC)
The FMS flies at the speed that gives the furthest distance per kg of fuel. Slowest option. Mach is noticeably lower than typical — typically M0.80–0.82 for the A380 at FL370.
CI 20–60
ECON (typical operation)
The FMS computes the economically optimal speed for your airline's time/fuel cost ratio. Most real-world long-haul operations are in this band. CI 30 gives roughly M0.85 at FL370 for the A380.
CI 100+
High-speed / time priority
The FMS pushes toward Maximum Operating Mach (MMO). Used when recovering schedule delay is worth the fuel cost. Above CI ~120 you hit the Mach ceiling and the CI has no further effect.
CI does not only change cruise Mach. It also shifts the climb speed (higher CI = higher climb IAS, gets to cruise faster but burns more in climb) and the descent profile (higher CI = steeper managed descent angle). The effect is across all phases simultaneously.

Common CDU mistakes

Entering ZFW but forgetting BLOCK — or entering them in wrong units

ZFW and BLOCK must both be in kilograms (or tonnes depending on units setting). If you enter your block fuel in pounds thinking the CDU expects pounds, you will load roughly half the actual fuel on paper — predictions will show fuel exhaustion mid-ocean. Always confirm the units displayed on the FUEL&LOAD page match what you intend.

Not inserting the TMPY after plan changes

After changing the STAR, adding a direct-to, or modifying the arrival, the yellow TMPY F-PLN chip appears. Simmers frequently navigate away to another CDU page without pressing INSERT, then wonder why the ND still shows the old route. The modification is pending, not applied, until you explicitly confirm it.

Ignoring discontinuities on the ND

A discontinuity between two waypoints that are far apart geographically can cause the AP to turn 90 or 180 degrees when the upstream waypoint is passed. Always check the ND after any plan change — look at what the magenta line actually does. If it goes somewhere unexpected, find and close the discontinuity first.

Activating the approach phase too early via PERF APPR

The approach phase changes managed speed to VAPP, which at full flap is typically 137–145 kt. If you manually activate it from the PERF APPR page while still at FL200 in clean configuration, managed speed drops immediately to VAPP. The aircraft decelerates at idle to that speed 200 miles out. Let the approach phase auto-activate, or only manually activate it when established inbound below 10,000 ft.

Not programming the arrival early enough

The STAR, approach, and runway should be entered at least 20–30 minutes before T/D. The FMS needs time to compute the descent profile including all constraints. If you enter the arrival after T/D, the profile recalculates mid-descent and T/D and DECEL markers jump — potentially leaving you high and fast.

Expecting the DIR TO page to work like a GPS "direct"

DIRECT mode on the CDU creates a direct leg to the selected waypoint — but the leg starts from the current aircraft position, not the last passed waypoint. This creates a new leg that may cut across the original route. The ND will show this immediately. If you wanted to stay on the planned route to a waypoint further down the plan, use the F-PLN page and simply delete intermediate waypoints instead.


VNAV & the vertical profile

VNAV — vertical navigation — is the FMS managing the aircraft's altitude and speed along a computed path, instead of you dialling vertical speeds by hand. It is the most misunderstood part of the automation, because the path is invisible until you learn to read the three places it shows up: the FMA, the PFD vertical deviation symbol, and the Vertical Display.

What VNAV is — and isn't

On takeoff and climb the FMS builds a vertical path up to cruise. In descent it builds a path down from the T/D to the runway that satisfies every altitude and speed constraint on the arrival. VNAV is the autopilot flying that path. The key distinction that governs everything:

Managed
The FMS owns the vertical target. In descent this is DES — the aircraft follows the computed profile and honours constraints. The FCU altitude is only a floor/clearance limit; the FMS picks the path within it.
Selected
You own the vertical target. OP DES, V/S, FPA — you pulled a knob and the FMS path is ignored. Constraints are no longer protected. This is how most simmers accidentally bust a crossing restriction.
The single rule that prevents most descent confusion: push = managed, pull = selected. On the A380 FCU, pushing the ALT knob engages the managed profile (DES); pulling it engages an open/selected mode (OP DES) that throws the profile away.

The descent profile

When you program the arrival, the FMS works backwards from the runway: it starts at the destination, applies the approach gradient, then each constraint, then an idle-thrust geometric path up to cruise altitude. Where that path meets your cruise level is the T/D. The profile has two characteristic segments:

FL distance to go → CRZ FL370 (T/D) idle-thrust segment FL100/250↓ geometric segment (DECEL) 3.0° GP DEST Built backwards from the runway · idle segment from T/D · geometric (fixed-gradient) segments between constraints
The managed descent profile — the FMS plans down from the threshold so every constraint is met at idle or near-idle thrust
Idle segment
From T/D, the aircraft descends at idle thrust at the managed descent speed. The path angle is whatever idle thrust produces — typically shallow up high, steeper lower down.
Geometric segment
Between two altitude constraints the path is a fixed straight gradient. The FMS may need a touch of thrust or speedbrake to hold it, because the geometry — not idle thrust — sets the angle.

DES vs OP DES — the two ways down

ModeWhat it doesConstraints
DESManaged descent. Follows the computed VNAV path. Manages speed and altitude together, adding drag or thrust to stay on the profile. Engaged by pushing the ALT knob with a lower FCU altitude set.Honoured — the path is built to meet them all.
OP DESOpen descent. Idle thrust, AP pitches to hold the selected/managed speed, descends until the FCU altitude. Ignores the VNAV path entirely. Engaged by pulling the ALT knob.Ignored — you are responsible for meeting them by hand.
V/SVertical speed. A fixed rate in ft/min you dial. Precise but you own the energy — easy to get slow or fast.Ignored.
OP DES is the most common cause of a "the plane won't level at the constraint" complaint. It was never going to — open descent flies to the FCU altitude and nothing else. If you need the crossing restrictions protected, you must be in managed DES.

Vertical deviation — the PFD symbol

In managed descent the PFD shows how far you are above or below the computed path. On the A380 this is a small symbol on the right side of the altitude tape — sometimes called the "bird" or the VDEV donut. It is the single most important VNAV instrument.

On path
The symbol is centred. The aircraft is exactly on the computed vertical profile. Thrust at or near idle.
Above path
The symbol sits low (the path is below you). You are high — the FMS will add drag or steepen. If it can't catch up, you need speedbrake. Persistent "above" is why arrivals get rushed.
Below path
The symbol sits high (the path is above you). You are low — the FMS shallows or adds thrust to recapture from beneath.
If you are consistently above the path in DES and idle + the FMS's own drag isn't recovering it, deploy speedbrake early. Energy is far easier to lose at altitude than at 3,000 ft. Waiting until short final to be high and fast is an unstable approach.

Why you end up high or low

The profile is a prediction. When reality differs from the prediction, the deviation grows. The usual culprits:

  • Wind — a tailwind stronger than forecast pushes you along faster than the path assumed, so you arrive at each point high. Headwind does the opposite.
  • Late arrival programming — entering the STAR or approach after the profile was built moves the constraints and recomputes T/D, often after you have already passed where you should have started down.
  • ATC altitude holds — being held high by ATC past T/D means the path runs away below you. The deviation symbol pegs at the bottom.
  • Speed intervention — selecting a faster descent speed than the managed schedule flattens the achievable idle gradient, putting you above path.

The Vertical Display (VD)

Below the ND, the A380 can show a Vertical Display — a side-on view of the terrain, your altitude, the computed path, and the constraints ahead. It is the clearest way to see whether the descent is going to work out, because it draws the profile and your position on the same picture.

Path line
The computed descent profile drawn ahead of the aircraft. If your altitude trend is diverging from it, you can see it developing miles in advance.
Constraints
Drawn as markers at their waypoints — white when satisfied by the plan, amber if the profile cannot meet them (a "constraint missed" situation).
FL marker / messages
The VD also shows the selected FCU altitude and posts messages like TRAJ NOT AVAIL when a valid path can't be computed, or VD RANGE CHANGE when the scale adjusts.
The VD only draws a profile when the ND is in ARC or ROSE-NAV mode. In PLAN or other modes there is no path to project, so it shows a reduced display.

Common VNAV mistakes

Pulling the ALT knob and expecting constraints to be honoured

Pulling selects OP DES — an open, idle descent to the FCU altitude that ignores every crossing restriction. If you need "cross WAYPT at FL100", you must be in managed DES (push), not OP DES. The aircraft will happily blow through the constraint in OP DES because, by design, it isn't looking at it.

Starting down late and never catching the path

If ATC or indecision keeps you at cruise past T/D, the path drops away beneath you and the deviation symbol pegs. Idle thrust alone often won't recover it on the A380. Use speedbrake, and accept a steeper-than-ideal descent — or request a delaying vector to lose the altitude. Don't expect managed DES to perform magic recovery.

Confusing the FCU altitude with the descent target in managed DES

In DES the FCU altitude is a clearance floor, not the thing you are descending to. The FMS descends along its profile and will level at the FCU altitude if it reaches it first. Set the FCU to your cleared altitude; the FMS handles the steps in between via constraints.

Selecting a faster descent speed and then wondering why you're high

A faster descent speed produces a shallower idle gradient — you cover more ground for each foot lost, so you stay above the path. If you want to get down, slow down (or add drag), counter-intuitive as that feels. Speed and path are coupled in idle descent.


Auto-thrust in depth

Auto-thrust (A/THR) on the A380 behaves unlike the throttle on most aircraft, and the single fact that trips up every newcomer is this: the physical thrust levers do not move when A/THR is working. You set them in a detent and leave them. The lever position becomes a limit and an arming switch, not a direct command. Understanding that one idea explains almost every A/THR surprise.

Speed law vs thrust law

A/THR is always operating in one of two laws. The FMA column 1 tells you which (see the FMA page), and they feel completely different:

Speed law
A/THR continuously varies thrust to hold a speed target (SPEED / MACH on the FMA). The autopilot controls pitch for something else (a path, an altitude). This is cruise and approach. Thrust moves; speed is rock-steady.
Thrust law
A/THR pins thrust at a fixed rating — climb (THR CLB), idle (THR IDLE), TOGA. The autopilot then controls speed with pitch. This is climb and open descent. Thrust is fixed; speed is held by the elevator, so it wanders a little.
Who-holds-speed is the whole game. In speed law the engines hold speed. In thrust law the elevator holds speed. If you see the nose hunting in a climb, that's thrust law working normally — not a fault.

The four detents

The thrust levers have physical notches. With A/THR active, the lever you rest in sets the maximum thrust A/THR is allowed to command, and it arms A/THR engagement. From idle forward:

IDLE 0.0 CL ~0.89 · the home detent MCT ~0.95 (FLEX at same gate, on TO) TOGA 1.0 · max In the cruise the levers sit in CL and never move — A/THR modulates thrust underneath the detent
Thrust lever detents. After takeoff the levers are set to CL and left there for the entire flight until the flare.
DetentWhat it commandsWhen you use it
TOGAFull thrust. On the ground arms takeoff; in flight triggers go-around. The absolute maximum.Takeoff (full power), go-around, windshear escape.
FLEX / MCTSame physical gate. On takeoff it's FLEX (reduced thrust to your assumed temperature). In flight it's MCT — maximum continuous, the cap for engine-out.Flex takeoff; single-engine operations.
CLClimb thrust limit — and the home detent. With A/THR active and levers in CL, A/THR is free to modulate anywhere from idle up to climb thrust.Set just after takeoff; stays here all flight.
IDLELevers fully back. With A/THR active this is still the floor; A/THR commands above it. Pulled back manually it's how you disconnect into idle.Flare/landing, manual idle.

Active vs armed — and how the levers control it

A/THR has two states that the FMA distinguishes. Active (green A/THR in FMA column 5) means it is moving thrust right now. Armed (the levers are out of the active range) means it is ready to take over but the lever position is currently commanding thrust directly.

  • Below or in the CL detent, A/THR active → A/THR commands thrust up to the CL limit. The levers don't move.
  • Push a lever above CL → that lever commands thrust directly (manual), A/THR goes to armed. This is how you'd add thrust manually if needed.
  • Idle thrust levers fully back with A/THR off → fully manual thrust at idle.
The disconnect trap. Because lever position controls A/THR engagement, accidentally moving a lever out of the CL detent — even slightly, even by bumping a hardware throttle — disconnects A/THR or drops it to armed. The FMA A/THR label is your only warning. If it vanishes unexpectedly, your first check is always the lever positions.

Alpha floor & TOGA LK

A/THR includes a stall protection that overrides everything else. If angle of attack exceeds a threshold, A.FLOOR triggers and commands TOGA thrust regardless of lever position or mode — shown amber on the FMA. It is one of the strongest protections in the aircraft.

A.FLOOR
Active alpha-floor protection. TOGA thrust commanded automatically because AoA got too high. You'll see it in low-speed/high-pitch situations. Lower the nose and the condition clears.
TOGA LK
After A.FLOOR conditions pass, thrust stays locked at TOGA ("TOGA Lock") so you can't accidentally sink again. To release it you must disconnect A/THR (instinctive disconnect button) and re-engage — thrust then returns to normal control.

Managed vs selected speed targets

In speed law, A/THR holds a target — but where the target comes from depends on the FCU speed knob:

ModeTarget sourceFCU window
ManagedThe FMS picks the speed for the phase — climb schedule, ECON Mach, the approach VAPP. Knob pushed in.Dashes --- with a magenta dot.
SelectedYou dialled a specific speed. A/THR holds exactly that. Knob pulled out.The number you set, in cyan.
On approach in managed speed, A/THR targets VAPP — computed from landing weight via the speed tables, then corrected for up to 1/3 of the headwind (capped +15 kt) and floored at VLS so it can never command an unsafe speed. See the CDU PERF APPR notes for the full VAPP logic.

Common auto-thrust mistakes

Treating the levers like a normal throttle and "flying" them

With A/THR active the levers stay in CL. Constantly nudging them pushes A/THR in and out of armed, fights the automation, and risks a full disconnect. Set CL after takeoff and don't touch them again until the flare.

Not noticing A/THR dropped out after bumping a hardware throttle

A physical throttle even slightly out of the CL detent band disconnects auto-thrust. If you have hardware, calibrate the detents on the EFB (see Chapter 5 — Calibrating hardware throttles) — and any time the A/THR FMA label disappears without you pressing the button, suspect the levers first. Thrust then freezes wherever the levers are.

Pulling thrust to idle to "help" the descent with A/THR on

In managed descent A/THR is usually at idle already in thrust law; if it's in speed law it's holding speed. Hauling the levers back manually disconnects A/THR. If you want more drag, use speedbrake — that's what it's for. Leave the thrust automation alone.

Expecting to cancel TOGA LK by pulling the levers back

TOGA LK survives lever movement by design — it's protecting you. The only way out is to disconnect A/THR with the instinctive disconnect button and re-engage. Pulling the levers back while locked does nothing to the thrust.


Approach modes

The A380 can fly several kinds of approach, and the automation behaves differently for each. The job on final is to know which one you've armed, confirm it captured in the right order, and understand exactly what the aircraft will and won't do for you down to the runway.

The three approach families

ILS
Radio precision approach. The ground transmits a localizer (lateral) and glideslope (vertical) beam. The AP flies LOC and G/S — both shown green. Supports full autoland to CAT3. This is the gold-standard approach.
FLS
FMS Landing System. For non-precision approaches (VOR, NDB, LOC-only), the FMS synthesises an ILS-like beam from the navdata. Flown as F-LOC and F-G/S — shown magenta, the colour that says "computed, not a real radio beam".
RNAV / RNP
Satellite/FMS lateral with a computed vertical path. Flown using APP NAV + FINAL (or FINAL APP). Relies on FMS position accuracy rather than a ground transmitter.
Colour is the instant tell. Green LOC/GS = real ILS radio beam. Magenta = FLS computed beam. If you briefed an ILS and the FMA is magenta, the ILS didn't tune — stop and fix it before you go below the platform altitude.

The APPR button & capture sequence

Pressing APPR on the FCU arms the approach. For an ILS that arms LOC and G/S together — they then capture in a strict order. Getting the order right is the difference between a stable approach and a scramble.

RWY glideslope beam (from below) localizer centreline 1 ARM APPR pressed LOC+GS cyan 2 LOC* centreline captured 3 G/S* beam captured from below Always LOC first, then G/S from below. Intercept the localizer level, beneath the glideslope.
ILS capture geometry — arm both, capture the localizer level, then let the glideslope come down to you
  1. Arm — press APPR. LOC and G/S appear cyan in FMA column 4. (If only one appears, the approach isn't fully set up.)
  2. LOC capture — intercepting the centreline, LOC* flashes then goes steady green. The aircraft turns onto the runway heading.
  3. G/S capture — established on LOC and approaching the beam from below, G/S* flashes then green. The aircraft starts down the glidepath.
Intercept the glideslope from below, level at the platform altitude. If you arrive above the beam it cannot capture downward — the aircraft will fly level under an uncaptured G/S and sail through the approach. This is the classic "why won't it descend on the ILS" trap.

Autoland & CAT levels

An ILS approach can continue to a fully automatic landing. Autoland needs both autopilots engaged (press AP1 and AP2) so one monitors the other. The FMA then arms the landing sequence:

CAT3 / DUAL
Displayed on the PFD when the aircraft has the capability armed — both APs, both beams valid, systems healthy. CAT3 DUAL means autoland to the lowest minima is available.
LAND
Below ~400 ft the modes lock to LAND — LOC and G/S can no longer be disarmed by anything but a go-around. The aircraft is committed to the automatic landing path.
FLARE
At ~50 ft the nose is raised to arrest the descent. A/THR commands RETARD — thrust to idle.
ROLLOUT
After touchdown the AP keeps the aircraft on the centreline using rudder/nosewheel until you take over.
The CAT level you can use depends on the airport's ILS, your minima, and systems status. For simming, CAT3 DUAL autoland on a good ILS is the most satisfying to fly — arm both APs and watch LAND → FLARE → ROLLOUT sequence on the FMA.

Approach phase & managed deceleration

Separately from the AP modes, the FMS enters its APPROACH phase (see the FMS phases). This is what drives managed speed down through the flap schedule to VAPP. It auto-activates within ~7,200 ft of destination elevation while tracking NAV/LOC, or manually via PERF → ACTIVATE APPR PHASE.

  • At the (DECEL) pseudo-waypoint, managed speed begins stepping down as you extend flaps.
  • Each flap setting unlocks a lower managed target: clean → S → F → VAPP.
  • A/THR (in speed law) holds each target as you configure.

Go-around

A go-around is initiated by pushing the thrust levers to TOGA — the one time in the flight you move them out of CL deliberately. The aircraft transitions instantly:

SRS GA
Vertical mode targets the go-around climb speed. Pitch up to fly it.
GA TRK
Lateral mode holds the track that existed when TOGA was pushed, preventing wander during the initial climb.
CLB / NAV armed
Cyan in column 4 — they activate once you clean up and re-establish on the missed-approach routing.

Then it's the standard sequence: positive climb, flaps to CONF 3, gear up, follow the missed-approach. The full FMA picture for this is the sixth phase card on the FMA page.

Common approach mistakes

Arming APPR while above the glideslope

The glideslope captures from below only. If you press APPR already above the beam, LOC will capture but G/S stays armed and never triggers — the aircraft holds altitude and flies through the approach. Get down to the platform altitude and intercept level, beneath the beam.

Forgetting the second AP for autoland

Autoland requires AP1 and AP2 both engaged. With a single AP you'll fly the ILS down beautifully but the FMA won't arm LAND/FLARE and the aircraft won't complete the landing automatically. Press both before the LAND mode is needed.

Briefing an ILS but flying a magenta FLS

If the ILS frequency didn't auto-tune (wrong approach selected, or a navdata quirk), the FMS may give you an FLS approach instead — magenta F-LOC/F-G/S. It looks similar but it's a computed path, not a precision radio beam, and it can't autoland. Verify the FMA is green before committing.

Pressing APPR too early and arming far from the beam

Arm APPR when you're being vectored toward the intercept, not 60 miles out. Arming too early can capture a false course or sequence oddly. The standard is to arm once cleared for the approach and inside the intercept geometry.


ECAM system pages

ECAM — the Electronic Centralised Aircraft Monitor — is the system that watches every part of the aircraft for you and tells you, in plain text, what to do when something goes wrong. It lives on the two centre screens. Most of the time it manages itself; learning to read it (and when to override it) turns a wall of symbols into a clear picture of the aircraft's health.

The two screens: EWD and SD

ECAM information is split across the upper and lower centre displays:

EWD — Engine/Warning Display 82 82 82 82 N1 ×4 T.O MEMO AUTO BRK ... SIGNS ...ON SPLR ...ARM Fuel-on-board · flap/slat position · warnings, cautions, memos SD — System Display CRUISE / system schematic (auto-selected page or one you call up) ENG · BLEED · PRESS · ELEC · HYD · FUEL ... PERM DATA TAT +12 SAT +10 G.W 412 14:32z ECP buttons: ENG BLEED PRESS ELEC HYD FUEL APU COND DOOR WHEEL F/CTL ALL
EWD on top (engines + alerts), SD below (system schematics + permanent data), driven by the ECP buttons
EWD
Upper screen. Always shows the four engine N1 gauges, fuel on board, flap/slat position — and the warning/caution/memo list. This is where ECAM tells you what's wrong and the procedure to fix it.
SD
Lower screen. Shows one system schematic at a time — fuel, electrics, hydraulics, etc. — plus permanent data (temperatures, gross weight, clock) down the side. This is where ECAM shows you the system.

Auto-display logic

The SD chooses a page automatically based on what the aircraft is doing. You rarely need to select one by hand — but knowing the logic stops it feeling random:

The SD shows......when
DOOROn the ground at the gate, doors being operated.
APUDuring APU start and shutdown.
WHEELTakeoff and landing roll — gear, brakes, tyre status.
CRUISEAirborne, clean, in the cruise — a fuel + air summary.
ENGEngine start, or any engine parameter exceedance.
The relevant failed systemWhenever a warning or caution fires — ECAM jumps straight to the affected system so you can action the procedure.
If the SD "keeps changing pages on its own", it's the auto-logic doing its job. You can always override with an ECP button; press ALL to cycle through every page one at a time if you want the full tour.

The system pages

Every ECP button calls up one schematic. What each one is for:

ENG
Secondary engine parameters — oil pressure/temp/quantity, vibration, fuel used per engine.
BLEED
Pneumatic system — engine bleed air, packs, crossbleed, APU bleed feeding the air conditioning.
PRESS
Cabin pressurisation — cabin altitude, vertical speed, differential pressure, outflow valves.
ELEC AC / DC
Electrical network — generators, bus ties, batteries, external power. Two pages: AC and DC sides.
HYD
The green and yellow hydraulic systems — pumps, pressures, reservoir levels.
FUEL
Tank quantities, pumps, crossfeed, and the transfer/jettison state across the A380's many tanks.
APU
Auxiliary power unit — N, EGT, generator and bleed status during start/run.
COND
Air conditioning — cabin zone temperatures and the trim-air valves per deck.
DOOR
Every cabin and cargo door, plus slide-arming status.
WHEEL
Landing gear, brake temperatures, anti-skid, tyre pressures.
F/CTL
Flight controls — the position of every aileron, elevator, rudder and spoiler surface, and the computers driving them.
CRUISE
A combined summary page (fuel + pressurisation + temps) shown automatically in the cruise.
STATUS
The aircraft status summary — inoperative systems, limitations, and what's left available after a failure.

Warnings, cautions & the alert workflow

When something goes wrong, ECAM classifies it by severity and presents it on the EWD with an audible and visual cue:

Warning (red)
A condition needing immediate action — fire, configuration error, cabin pressure. Accompanied by the master WARN light and a continuous repetitive chime or specific aural.
Caution (amber)
A condition needing awareness and usually action, but not immediately critical. Master CAUT light and a single chime.
Memo (green/white)
Not a failure — reminders of normal items (e.g. SEAT BELTS, LDG GEAR) and the T.O / LDG configuration memos. Green = set correctly, amber = not yet.

ECAM lists the failure title, then a procedure: the actions to take, line by line. As you complete each action the line clears. The workflow buttons sit on the ECP:

CLR
Clears a completed alert or the procedure once actioned. Removes it from the EWD and reveals the STATUS page if there are consequences.
RCL
Recall — brings back alerts you previously cleared, in case you need to review them again.
STS
Calls up the STATUS page on demand to review limitations and inoperative systems.
The golden ECAM discipline: read the title, do the actions top to bottom, CLR only when done. Don't clear an alert to make the noise stop before you've actioned it — the procedure is the aircraft telling you how to handle the failure.

Common ECAM mistakes

Clearing a caution before actioning the procedure

Pressing CLR silences and removes the alert, but the underlying condition is still there. Work the procedure top to bottom first, then CLR. If you cleared too early, RCL brings it back.

Fighting the auto-display instead of using it

The SD jumping to the affected system on a failure is a feature — it's putting the right schematic in front of you. Let it. Use ECP buttons to look at other systems, not to stop it showing you the failed one.

Ignoring an amber memo as "just a reminder"

An amber T.O memo line means the aircraft is not configured for takeoff — spoilers not armed, flaps not set, etc. It's a reminder, but an important one. Green across the memo is your config check before you roll.

Not checking STATUS after a failure

After actioning a caution and clearing it, the STATUS page summarises what's now inoperative and any limitations (speed, altitude, approach category). Skipping it means flying the rest of the flight unaware of a restriction the failure imposed.