FlyByWire A380X Cold and Dark Startup: Step-by-Step Guide

So you downloaded the FlyByWire A380X, loaded into a cold and dark gate, and the four-engine giant just sat there in the dark while you wondered which of the hundred switches above your head does anything. That is the right place to start. The A380X is freeware, but "free" does not mean "simple" — this is one of the most ambitious aircraft in flight sim, and it does not hold your hand.

Two things to get straight before you touch a switch.

First, this aircraft is in active alpha development. As of writing it is on the v0.14.0 stable release (the December 2025 build that brought MSFS 2024 compatibility), and FlyByWire ships updates frequently. Switch behaviour, FMS pages, and ECAM logic genuinely change between versions. Everything below was checked against the official FlyByWire documentation, but if a panel looks different in your build, the official docs at docs.flybywiresim.com are the source of truth. Treat this guide as a map, not gospel.

Second, the A380 is a four-engine aircraft, and it is not a stretched A320. It has three inertial reference units, yes — but it also has a largely automatic fuel system you mostly leave alone, two hydraulic systems (not three) backed by electric actuators, three-spool Rolls-Royce Trent engines with N1/N2/N3, and a flight management system you drive through a Multi-Function Display with a trackball, not a keypad MCDU. If you come in expecting the Fenix or the A32NX, several habits will trip you up. This guide flags them as we go.

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Coming from the A320 world? The A380X runs FlyByWire's own flight management system, the same project family as the A32NX — the logic of Airbus FMS programming (INIT, flight plan, performance, managed vs selected) carries straight across, even though the A380 presents it on the MFD rather than a keypad MCDU. If you want to drill that Airbus FMS logic in your browser before you load the sim, our free A320 MCDU Trainer walks you through INIT setup, route entry and performance with instant feedback. The page flow differs on the A380, but the thinking is identical.

Before You Touch Anything: The flyPad EFB

The A380X comes with the flyPad — FlyByWire's Electronic Flight Bag, mounted on the captain's side. Use it before the procedure to set the aircraft up:

• Ground services — connect external power (GPU), set chocks, request pushback
• Fuel and payload — the flyPad has SimBrief integration and EFB-based fuelling; load your fuel and passengers here rather than fighting the sim's native menu
• Settings — this is also where you choose realistic versus instant ADIRS alignment

Note down your Zero Fuel Weight, ZFW centre of gravity, and block fuel from the flyPad. You will type them into the FMS later. One honest caveat: on the current alpha the first officer's flyPad receives touch input but does not render a display, so work from the captain's side.

Phase 1: Initial Electrical Power

The cockpit is dead. Everything begins with electricity, and the A380 gives you more battery switches than you are used to.

Step 1: Batteries

On the overhead electrical panel, you have four battery switches, not two:

• BAT 1 — ON
• ESS BAT (essential battery) — ON
• BAT 2 — ON
• APU BAT (APU battery) — ON

The cockpit half-wakes. You will see standby instruments come up and a wall of amber lights appear — that is normal, the aircraft is just reporting that nothing else is configured yet.

Step 2: External Power

If you connected the GPU through the flyPad, bring on the external power supplies. The A380 has multiple external power connections, and the documented order is EXT PWR 2, 3, 1, 4 — ON.

The displays boot properly: the PFDs, NDs, the ECAM, and the MFDs all come to life. If the AVAIL lights are not showing on the EXT PWR buttons, go back to the flyPad and confirm ground power is connected. No GPU at a remote stand? You can start the APU on battery power instead and skip straight to the APU phase.

Step 3: Cockpit Lighting and Radios

• Cockpit lighting — set as required for your conditions
• RMP 1 and RMP 2 (Radio Management Panels) — ON
• Standby radio navigation — OFF (normal)
• Tune your communication frequencies as needed

Phase 2: Fire Tests and APU Start

Step 4: Fire Detection Tests

Before relying on the fire protection system, test it. On the overhead, run the fire detection tests for the APU and for all four engines. This is part of the documented cold-and-dark flow and a habit worth keeping — it confirms the loops that protect a very large, very expensive aeroplane.

Step 5: Start the APU

The APU is a small jet engine in the tail that supplies electrical power and, crucially, the bleed air you need to start the main engines. On a four-engine aircraft with three-spool engines, you cannot start without a bleed air source, so the APU matters even more than on a twin.

In the APU section of the overhead:

• APU MASTER SW — ON
• APU START — ON (press)

Watch the APU page on the ECAM. The APU spins up over roughly a minute and shows AVAIL when it is ready. One documented caution: do not run APU bleed if a high-pressure ground air unit (ASU) is already connected — use one source or the other.

Phase 3: ADIRS Alignment

This is the most time-critical item, so start it early. The A380 has three Air Data Inertial Reference Units (ADIRUs), each combining an air data reference with a laser-gyro inertial reference.

Step 6: IR Selectors to NAV

On the overhead ADIRS panel you will find three IR mode rotary selectors, each with OFF, NAV and ATT positions. Turn them to NAV in the documented order:

• IR 1 — NAV
• IR 2 — NAV
• IR 3 — NAV

The ON BATT indicator flickers briefly as a self-check — that is expected. Alignment then runs in the background while you do everything else.

A useful detail unique to the A380's three-unit setup: ADIRU 1 and 2 supply their on-side systems, and ADIRU 3 is a hot spare. Either ADR 3 or IR 3 can be manually selected to replace a failed 1 or 2 unit.

IR Mode	What It Provides
NAV	Full attitude + navigation — use this always
ATT	Attitude only, no navigation — emergency fallback
OFF	Nothing

If you are learning, switch on fast alignment in the flyPad settings so you are not waiting around. Once comfortable, use realistic timing — alignment finishes roughly as you complete the FMS, which is exactly why it goes first.

Phase 4: Overhead Systems Check

Here is the biggest mental shift from the A320: on the A380, you verify systems are in their automatic state rather than manually switching everything on.

Step 7: Fuel — Leave It in AUTO

The A380 fuel system is largely automatic. It stores fuel, monitors quantity and temperature, and manages transfers between tanks to maintain the centre of gravity and reduce structural loads — on its own. The aircraft has feed tanks (TK 1, 2, 3, 4), inner, middle and outer tanks, and a trim tank.

The pump push-buttons (the FEED TK MAIN and STBY pumps, and the transfer pump and transfer-selector push-buttons) sit in AUTO by default, and that is where you leave them for a normal departure. Do not start flicking them off the way you might toggle individual A320 pumps — on the A380 the system handles feed and transfer for you. Touch these only if you have a specific reason (a failure scenario or manual transfer).

Step 8: Hydraulics

The A380 has two hydraulic systems — GREEN and YELLOW — not the three-colour Green/Blue/Yellow setup of the A320. They run continuously and power the flight controls, landing gear and cargo doors. The flight controls also use Electro-Hydrostatic Actuators (EHAs) and Electrical Backup Hydraulic Actuators (EBHAs), which is why an A380 can keep flying control surfaces working from electrical power alone.

For a normal cold-and-dark start, confirm the hydraulic panel is in its normal configuration. As with the A320, pressure will read low until the engines drive the pumps — that is expected on the ground.

Step 9: Signs and Lights

• SEAT BELTS — ON
• NO MOBILE (no-smoking equivalent) — AUTO
• Exterior lights (NAV/LOGO, etc.) — as required for your conditions
• Leave landing and strobe lights for the runway

Phase 5: Preparing the FMS

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The A380 does not have a keypad MCDU on the pedestal. Instead you program the Flight Management System (FMS) through the Multi-Function Display (MFD) — one on each side of the main panel — driven by the Keyboard Cursor Control Unit (KCCU) on the pedestal, which gives you a trackball and a keyboard. You point, click and type rather than line-selecting. It is the modern Airbus interface, and once it clicks it is faster than the old MCDU.

The underlying FMS logic, though, is the same Airbus thinking the A32NX uses. Work through these pages:

Step 10: INIT

On the INIT page, enter:

• Flight number (FLT NBR)
• FROM / TO / ALTN — your departure, arrival and alternate ICAO codes
• COST INDEX (CI) — the fuel-versus-time tradeoff (low burns less fuel and flies slower; if unsure, something modest like 30–50 is a safe default)
• CRZ FL / CRZ TEMP — your planned cruise level

Step 11: F-PLN

Build your route on the flight plan page:

• Select your departure runway and SID
• Add en-route waypoints and airways
• Select your STAR at the destination

Watch for discontinuities (gaps shown in the plan) and clear them, exactly as you would on any Airbus FMS — leave one in and the aircraft will stop navigating when it reaches the gap.

Step 12: NAVAIDS

On the NAVAIDS page, tune any VORs you need and set the ILS frequencies for departure and arrival.

Step 13: FUEL&LOAD

Enter the weights you noted from the flyPad:

• ZFW (Zero Fuel Weight) and ZFWCG
• BLOCK fuel
• TAXI fuel
• PAX NBR (passenger count)
• ALTN and FINAL reserve fuel

The FMS then computes your takeoff weight and predictions. As a sense-check, the A380 is an enormous aircraft — takeoff weights well over 300 tonnes are entirely normal here, so do not be alarmed by the numbers.

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Step 14: T.O PERF

On the takeoff performance page, enter:

• V1, VR, V2 — your decision, rotation and safety speeds. Use the performance tools (SimBrief or the flyPad) to calculate these for your weight, runway and conditions. Wrong V-speeds are one of the genuinely dangerous mistakes in aviation, so calculate, do not guess.
• Thrust mode — FLEX or TOGA
• FLEX TEMP — if using reduced-thrust (flex) takeoff, a temperature higher than the actual outside air temperature
• FLAPS — select 2 (the A380X takes off in CONF 2 in the default procedure)
• THS — the trim value from your loadsheet
• Transition altitude — for your departure airport

Step 15: BARO REF

On the glareshield, set the barometric reference (QNH) for your departure airport. Get it from ATIS, the flyPad weather page, or your SimBrief plan.

Phase 6: Before Engine Start

Step 16: APU Bleed On

You cannot start the engines without bleed air. Now that you are ready to start:

• APU BLEED — ON

This supplies the compressed air the starters need. (Again — not if you are on a high-pressure ground air unit.)

Step 17: Beacon and Pushback

• BEACON — ON, before you take pushback clearance. This is the signal to ground crew that engines are about to turn.
• Request pushback through the flyPad ground services (or your preferred pushback tool). You can start engines during the push, which is standard.

Phase 7: The Four-Engine Start

This is the headline difference from every twin you have flown. The A380X start is FADEC-managed — you do not manually introduce fuel the way you do on a Boeing — but you have four engine master switches to work through, and they are three-spool Trent engines, so you are watching N1, N2 and N3.

Step 18: Engine Mode Selector

On the engine start panel, the ENG MODE selector has three positions: NORM, IGN START and CRANK (CRANK is currently inoperative in the alpha).

• Turn the ENG MODE selector to IGN START

Step 19: Start the Engines

Officially, any engine may be started first at the pilot's discretion, but the documented beginner procedure works through them in order. After selecting IGN START, wait about 10 seconds — this lets the system run its start tests — then move the master switches on, one at a time, letting each engine stabilise as you go:

• ENG MASTER 1 — ON
• ENG MASTER 2 — ON
• ENG MASTER 3 — ON
• ENG MASTER 4 — ON

The procedure groups them as engines 1 and 2, then engines 3 and 4. The FADEC runs each start automatically — it spins the engine on bleed air, introduces fuel and ignition at the right moment, and brings it to idle. You just monitor.

What to Watch

The A380's Trent engines stabilise at idle around these values (from the FlyByWire documentation):

Parameter	Approx. idle value
ENG status	AVAIL
N1	~21%
N2	~63.8%
N3	~63.1%
EGT	~367°C
Fuel flow	~670 kg/h
Thrust	~4.2%

Note the three spools — N1, N2 and N3 — which is the Trent's defining feature and something you will never see on a CFM-powered A320. If an engine shows abnormal EGT or hangs during start, set that master back to OFF, exactly as on any jet.

Phase 8: After Engine Start

With all four running, configure for taxi. Follow the documented after-start order:

Step 20: After-Start Flow

• ENG MODE selector — back to NORM
• APU BLEED — OFF (the engines provide bleed air now)
• ENGINE ANTI-ICE — as required (turn it on for icing conditions, slush or snow on the taxiways, or OAT at or below 10°C)
• APU — OFF (its job is done; shutting it down saves fuel)
• GROUND SPOILERS — ARM
• RUDDER TRIM — ZERO
• FLAPS — set the takeoff position (CONF 2)
• PITCH TRIM — check the takeoff trim value on the PFD

Step 21: Flight Controls Check

Check the flight controls against the System Display (SD) F/CTL page. Move the sidestick fully forward, back, left and right and confirm the surfaces respond correctly; then check rudder. In the real procedure one pilot calls "full up, full down, neutral" while the other watches — solo, just confirm each surface moves the right way on the SD. On the A380 you press the PEDAL DISC button before testing the rudder.

A note on hardware: The A380 flies with an Airbus sidestick, not a yoke, so a purpose-built Thrustmaster TCA Sidestick Airbus Edition gives you the right grip angle and makes the controls check feel natural. The honest catch for a four-engine aircraft is the throttle: the consumer TCA Quadrant Airbus Edition is a two-lever unit, so to drive four engines you either map both physical levers to all four engines together (fine for normal symmetric ops) or add the Officer Pack, which adds two more levers for a full four-engine quadrant — and you will need to make sure all four are synchronised and calibrated so you do not get asymmetric thrust on the takeoff roll. Do not expect a consumer Airbus quadrant to be plug-and-play for a quad out of the box; it takes some mapping. Rudder pedals help with nose-wheel steering on a long aircraft and with crosswinds. For a full comparison across price ranges, see the best hardware for airliners guide.

Phase 9: Taxi

Step 22: Lights and Brake Release

• NOSE lights — TAXI
• RWY TURN OFF & CAMERA — as required (the A380's external camera helps you judge those long wings on taxiways)
• Release the parking brake

Step 23: Taxiing a Very Large Aircraft

The A380 needs surprisingly little thrust — the documentation notes no more than about 10% engine thrust is needed even at heavy weight, and excessive thrust can damage airport surfaces. Keep it gentle:

• Speed: 10–20 knots on straight taxiways, slowing to 8–10 knots in sharp turns
• Steering: use the tiller or rudder pedals; keep the taxiway centreline tracking between your PFD and ND as a sighting reference
• Two-engine taxi is an option to save fuel — use symmetrical engines only (ENG 2+3 or ENG 1+4), with inner engines preferred for tight turns

While taxiing, do a final check of the FMS route, confirm V-speeds, and review the SD for any cautions.

Phase 10: Lineup and Takeoff

Step 24: At the Runway

• Landing lights — ON
• Strobes — ON or AUTO
• NOSE lights — TAKEOFF
• Confirm takeoff configuration (flaps CONF 2, trim set, ground spoilers armed)

Step 25: Takeoff Roll

When cleared:

1. Release brakes and advance the thrust levers to the FLX/MCT detent (flex thrust) or TOGA detent (full thrust)
2. Verify symmetric thrust across all four engines
3. At V1, you are committed
4. At VR, apply a smooth backward stick input — aim for a rotation rate of roughly 2–3° per second over about five seconds, reaching around 12.5° pitch. Do not yank it; this is a long aircraft and over-rotation risks a tail strike. Follow the flight director once airborne.
5. Positive climb confirmed — gear up

Step 26: Initial Climb

At the thrust reduction altitude (typically around 1,500 ft AGL), the FMA flashes LVR CLB. Pull the thrust levers back to the CL (Climb) detent — this hands thrust management to the autothrust system. From here, the aircraft accelerates and you retract flaps on schedule (at F speed, then S speed) as it cleans up and follows the SID.

At the transition altitude, switch your barometric reference from QNH to STD.

You are flying the largest passenger aircraft in the sim.

Common Mistakes

Treating the Fuel Panel Like an A320

The single most common A320-to-A380 error: hunting for fuel pump switches to flip on. On the A380 they live in AUTO and the system manages feed and transfer itself. Leave them alone unless you are running a failure scenario.

Expecting Three Hydraulic Colours

The A380 has GREEN and YELLOW — two systems — backed by electric actuators. If you go looking for the Blue system, you will not find it.

Forgetting APU Bleed Before Start

No bleed air, no start. If you turn the masters on and nothing happens, check that the APU is AVAIL and APU BLEED is ON (or that you have a ground air unit connected).

Starting Without ADIRS Aligned

Same as any Airbus: red attitude and heading flags, no autopilot, no FMS navigation. Turn IR 1, 2, 3 to NAV first thing and let alignment run in the background.

Over-Rotating on Takeoff

The A380 is long. Rotate smoothly to about 12.5° at 2–3° per second — do not pull it up like a fighter, or you will drag the tail.

Assuming the Version Hasn't Changed

This aircraft is alpha and updates often. If a switch or page does not match this guide, your build has probably moved on. Cross-check against docs.flybywiresim.com.

Where to Go Next

Cold and dark to airborne is the first milestone. From here:

• Practise the Airbus FMS logic in your browser with our free A320 MCDU Trainer. The A380 uses the MFD and KCCU rather than a keypad, but the INIT, flight-plan and performance thinking transfers directly.
• Fly a smaller Airbus first. If the A380 feels like a lot, the iniBuilds A320neo v2 tutorial and the Fenix A320 cold and dark startup cover the same Airbus philosophy on a more manageable airframe — and most of what you learn there applies to the big jet.
• Understand the wider picture. Our A320 vs 737 comparison explains the Airbus design philosophy — managed automation, sidestick, FADEC thrust — that runs all the way up to the A380.

The A380X is a remarkable piece of freeware, and flying it well teaches you more about big-aircraft systems than almost anything else in the sim. Take the startup slowly, keep the official docs open alongside it, and the rest of the aeroplane will start to make sense.

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If you have followed this guide and something still is not clicking — or you want someone to watch your screen and spot exactly where it is going wrong — consider booking a session with one of our experienced flight sim tutors. The A380X has real depth, and a focused session with someone who knows Airbus systems can save you hours. Browse available tutors and find one who specialises in Airbus aircraft.