> ## 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.

# Pushback

> Pushback: conditions, actions and checks for the Boeing 737-800.

Use this procedure when its prerequisites apply. Confirm each required aircraft state before acknowledging the corresponding checklist item.

## General

Carry out pushback under the assigned ground-handler instructions. Maintain parking-brake coordination with the handler. A ground-call button does not establish clearance to move or a parking-brake instruction.

After pushback is complete, establish the required hydraulic-pump configuration. Completion of the pushback procedure does not establish engine-start completion. Select [Engine Start](https://www.narev.ai/docs/irl-gym/aircraft/procedures/engine-start-1.md) for the engine-start procedure.

### 1. Transponder — **As needed**

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

> **Checks and evidence**
>
> **Expected response:** As needed
>
> **Verification:** Read back the actual code and mode; for explicit TA/RA or STBY select that named mode.

### 2. Parking brake — **By ground handler**

Set or release the parking brake only as instructed by the ground handler. Observe the current state and verify the requested result.

> **Checks and evidence**
>
> **Expected response:** By ground handler
>
> **Verification:** Observe the requested brake state, and for ground-handler control obtain the actual handler instruction.

### 3. Parking brake response: last word is cut off in the source screenshot. — **Note**

Acknowledge the source note. Obtain the actual parking-brake instruction from the ground handler.

> **Checks and evidence**
>
> **Expected response:** None
>
> **Verification:** Acknowledge this note. Do not record it as a completed physical check.

### 4. After pushback: Hydraulic pumps — **On**

**Condition:** After pushback.

After pushback is complete, select the hydraulic pumps required by the applicable panel procedure ON. Verify the required switch and system indications.

> **Checks and evidence**
>
> **When:** After pushback.
>
> **Expected response:** ON
>
> **Verification:** Require pushback completion/ground clearance and the intended pump states.

## Continue after this procedure

No explicit source transition is declared. Select the next applicable procedure after the required completion and entry conditions are established.


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