> ## 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.

# First officer preflight — part 2

> First officer preflight — part 2: 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

Complete the preliminary, CDU, captain and first-officer procedures in the applicable ground configuration. Retain the side-specific requirements. A captain instrument or control does not satisfy an independent first-officer or standby check.

Use the assigned detailed panel procedures for Set, Check, Test and Pass requirements. Observe the specified result and restore the required operating configuration after each actual cockpit test. Do not operate a system merely because its control appears in the reference list.

Complete loading, performance preparation and the required equipment checks before progressing to the dependent departure procedures. Where an item requires an external inspection or crew adjustment, retain the assigned verification or explicit scenario exclusion.

### 1. Emergency exit light — **Guard closed**

Verify the emergency-exit-light guard is closed; do not treat a switch direction command as guard evidence.

> **Checks and evidence**
>
> **Expected response:** Guard closed
>
> **Verification:** Observe the guard and the required configuration.

### 2. Passenger signs — **Set**

Resolve the required seat-belt and no-smoking/chime selections from mission context and installed configuration.

> **Checks and evidence**
>
> **Expected response:** Set
>
> **Verification:** Verify the actual requested signs/switch states.

### 3. Windshield wiper — **Park**

Set the applicable windshield wiper to PARK.

> **Checks and evidence**
>
> **Expected response:** PARK
>
> **Verification:** Observe the wiper switch in PARK and the appropriate resulting state.

### 4. Window heat — **On**

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

> **Checks and evidence**
>
> **Expected response:** ON
>
> **Verification:** Use actual switch state and the meaning of each window-heat annunciator.

### 5. Probe heat — **Off**

Apply the checklist’s literal OFF or ON requirement to all applicable probe heat systems for the configured aircraft.

> **Checks and evidence**
>
> **Expected response:** OFF
>
> **Verification:** Confirm the relevant switch states and both probe-system outcomes.

### 6. 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.

> **Checks and evidence**
>
> **Expected response:** OFF
>
> **Verification:** Verify the selected switch state and the relevant valve/annunciator outcome under a the applicable decoder.

### 7. Engine anti-ice — **Off**

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

> **Checks and evidence**
>
> **Expected response:** OFF
>
> **Verification:** Require switch-state and corresponding system/annunciator evidence.

### 8. Hydraulic panel — **Set**

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

> **Checks and evidence**
>
> **Expected response:** Set
>
> **Verification:** Verify required pump positions, pressures/quantities and relevant indications.

### 9. Air conditioning panel — **Set**

Expand this panel setup with an approved detailed procedure and the mission’s air/power plan.

> **Checks and evidence**
>
> **Expected response:** Set
>
> **Verification:** Verify each specified selector and air-source requirement.

## Continue after this procedure

Continue to [First officer preflight — part 3](https://www.narev.ai/docs/irl-gym/aircraft/procedures/first-officer-preflight-3.md). The checklist adds no condition between these parts; the next part’s individual step conditions still apply.


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