Which items are checked when you close and lock the crew entrance door?

• A. Door Hooks Engaged
• B. Micro Switch Engaged
• C. Door Open Lights Extinguished
• D. All Of The Above

Answer: (D)

Verifying a closed and locked crew entrance door relies on multiple interlocks and indicators to ensure true security. When you close and lock the door, you must verify three things: the door hooks are engaged, the micro switch indicates the door is fully closed, and the door open lights are extinguished. Each check confirms a different aspect of the safe state: hooks engaged shows the locking mechanism is latched, the micro switch ensures the door is seated and not ajar, and the extinguished door open lights confirm the system recognizes that the door is not open. Relying on any single check could miss a partial or unsafe state, such as the door not being fully latched or the system not reflecting the actual door position. Therefore, all three conditions must be true to consider the door properly closed and secured.