> ## 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.

# Before start

> Before start: 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

Verify the flight-deck door, CDU display, N1 references, IAS references and Mode Control Panel for the assigned departure. Use the actual loading and applicable performance data.

Close and verify the door lock independently. Confirm that the displayed reference speeds and N1 targets are the intended values; the presence of a bug or a successful data-entry action does not establish its correctness.

### 1. Flight deck door — **Closed/locked**

Close the flight-deck door and verify its locked condition, not only that a close command was accepted.

> **Checks and evidence**
>
> **Expected response:** Closed/locked
>
> **Verification:** Require separate closed and locked evidence.

### 2. CDU display — **Set**

Select and verify the mission-required CDU page, using displayed labels rather than assumed LSK positions.

> **Checks and evidence**
>
> **Expected response:** Set
>
> **Verification:** Verify the actual page and required data fields.

### 3. N1 bugs — **Check**

Cross-check the takeoff N1 reference bugs against the applicable performance data and actual aircraft configuration.

> **Checks and evidence**
>
> **Expected response:** Check
>
> **Verification:** Read the displayed target N1 values and compare with approved results; actual N1 is separate.

### 4. IAS bugs — **Check**

Cross-check the takeoff reference-speed bugs against the applicable V1, VR and V2 performance data.

> **Checks and evidence**
>
> **Expected response:** Check
>
> **Verification:** Verify the actual displayed reference speeds on the expected page/display.

### 5. MCP — **Set**

Set the assigned Mode Control Panel targets and switch selections. Verify each selected target and mode separately.

> **Checks and evidence**
>
> **Expected response:** Set
>
> **Verification:** Read back each required target and switch separately.

## Continue after this procedure

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


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.