> ## Documentation Index
> Fetch the complete documentation index at: https://www.narev.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Shutdown and securing

## Shutdown

Begin shutdown in the assigned parked condition. Set the parking brake and establish the required electrical supply before moving engine start levers to CUTOFF.

The checklist requires fuel pump switches OFF without a listed APU exception. Engine bleed ON is a switch-selection requirement, not an indication that a stopped engine supplies air. Account for the assigned APU and electrical/air configuration.

With Airside Services active, anti-collision OFF can initiate deboarding and cargo unloading.

## Secure

Select the secure procedure when required after shutdown. Its four checks are IRS OFF, emergency-exit lights OFF, window heat OFF and packs OFF. A battery-OFF or mandatory APU-OFF step is not included. Record the actual end condition; secure-checklist completion alone does not establish cold-and-dark.

**1. Parking brake — Set**

Set the parking brake using the configured brake procedure. Verify the brake is set.

**2. Electrical power — Set**

Use an approved electrical-panel subprocedure, confirming the intended source and bus configuration.

**3. Engine start levers — CUTOFF**

Set both engine start levers to CUTOFF. The start levers control fuel admission; they are separate from the rotary engine start switches.

**4. Fasten belts — OFF**

Set the fasten-belts sign to OFF at the supplied shutdown step and confirm the sign/switch state.

**5. Anti-collision light — OFF**

Set the beacon/anti-collision light OFF at this shutdown step and verify the result.

**6. Fuel pump switches — OFF**

Establish the supplied shutdown response OFF for the fuel-pump switches, reading each current state before any toggle.

**7. CAB/UTIL — As needed**

Resolve and apply the required cabin/utility power selection.

**8. IFE/PASS SEAT — As needed**

Resolve and apply the required in-flight-entertainment/passenger-seat power selection.

**9. Wing anti-ice — OFF**

For an explicit OFF, establish OFF. For As needed, first resolve the mission’s icing decision using an approved policy; do not infer it from temperature alone.

**10. Engine anti-ice — OFF**

Apply the required anti-ice state to the applicable engines; resolve As needed before issuing a command.

**11. Hydraulic panel — Set**

Use the approved hydraulic-panel setup; do not interpret Set as a command to toggle every pump.

**12. Recirculation fan — As needed**

Resolve the required fan state(s) for this shutdown context and change only as necessary.

**13. Pack switches — AUTO**

Set both pack switches AUTO. Verify both selector positions using the applicable detent decoding.

**14. Isolation valve — OPEN**

Select the isolation-valve selector OPEN. Verify the selector position; verify actual valve state separately when required.

**15. Engine bleed — ON**

Establish ON for the applicable engine-bleed switches at the supplied shutdown step.

**16. APU bleed — ON**

Select APU bleed ON in accordance with the applicable air-supply configuration. Verify the required switch and valve indications.

**17. Exterior lights — As needed**

Apply the approved lighting-panel setup without inventing which lights Set includes.

**18. Flight director — OFF**

Set the required flight-director switch(es) OFF, checking current state before using a toggle.

**19. Transponder — STBY**

Set code and mode from the mission/clearance, then verify both. Code and mode are separate requirements.

**20. APU switch — As needed**

Resolve the required APU state for this phase from the mission’s electrical/air plan, then use a validated APU switch procedure.

## Secure

Begin shutdown in the assigned parked condition. Set the parking brake and establish the required electrical supply before moving engine start levers to CUTOFF.

The checklist requires fuel pump switches OFF without a listed APU exception. Engine bleed ON is a switch-selection requirement, not an indication that a stopped engine supplies air. Account for the assigned APU and electrical/air configuration.

With Airside Services active, anti-collision OFF can initiate deboarding and cargo unloading.

## Secure

Select the secure procedure when required after shutdown. Its four checks are IRS OFF, emergency-exit lights OFF, window heat OFF and packs OFF. A battery-OFF or mandatory APU-OFF step is not included. Record the actual end condition; secure-checklist completion alone does not establish cold-and-dark.

**1. IRS mode selector — OFF**

Select the applicable IRS mode selectors OFF. Verify OFF; do not initiate alignment.

**2. Emergency exit lights — OFF**

Bring the emergency-exit-light switch to OFF for secure and verify it.

**3. Window heat — OFF**

Establish the required ON/OFF condition for the applicable window-heat switches using observed current state.

**4. Pack switches — OFF**

Set both pack switches OFF. Verify both selector positions using the applicable detent decoding.

## Detailed procedures

The following pages preserve each checklist item’s conditions, verification requirements and source identity.

* [Shutdown (1/3)](https://www.narev.ai/docs/irl-gym/aircraft/procedures/shutdown-1.md)
* [Shutdown (2/3)](https://www.narev.ai/docs/irl-gym/aircraft/procedures/shutdown-2.md)
* [Shutdown (3/3)](https://www.narev.ai/docs/irl-gym/aircraft/procedures/shutdown-3.md)
* [Secure (1/1)](https://www.narev.ai/docs/irl-gym/aircraft/procedures/securing-the-aircraft.md)


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