Boeing 737-800 NG · Interactive procedures

Step-by-step

Walk through each flow one action at a time. The control you need lights up on the panel, with the reason behind every step.

Start the APU for electrical power and bleed air. · REF FCOM NP — Preflight / APU

FORWARD OVERHEAD

Illustrative cockpit image — dot shows approximate location

STEP 1 / 6

Battery switch

ON (guard closed)

Why · Powers APU start circuitry.

How to do it · Use the flow pattern from the top of the overhead panel; check that all lights are extinguished or explained.

What it does · Houses the electric, fuel, hydraulic, air conditioning, lighting and anti-ice controls.

Confirm · Dark panel principle: no amber light left on without a reason.

Common mistake · Missing a light on the far part of the panel.

Ground · FCOM NP — Preflight / APU · NEXT: Left aft fuel pump (if AC available) ON

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Arrow keys work too

1. 01Battery switchON (guard closed)
2. 02Left aft fuel pump (if AC available)ON
3. 03APU switchSTART (hold, release to ON)
4. 04APU GEN OFF BUS lightILLUMINATED (blue)
5. 05APU GEN switchesON BUS
6. 06APU BLEEDON

EDUCATIONAL USE ONLY. Content is summarised from manufacturer documentation for learning. It is not approved flight or maintenance data. Always use the current, aircraft-specific POH/AFM, FCOM, QRH, AMM and operator procedures.