On the 777-300ER, the Cabin Door Status is used by FA 1/Purser to:

• A. Confirm the doors are closed and locked
• B. Identify if the door is armed
• C. Determine slide type
• D. Notify the crew of the door position

Answer: (A)

The Cabin Door Status display on the 777-300ER shows whether each cabin door is closed and locked, and that at-a-glance confirmation is what the FA 1/Purser relies on to ensure all doors are securely secured before departure. This status provides the essential assurance that doors are properly shut and cannot open during taxi, takeoff, or flight. Other indicators handle different functions—arming status relates to slide deployment, and slide type is a fixed attribute of the door itself, not something shown by this status screen. While the status can reflect door position, its primary purpose is to confirm closure and locking, giving the purser a clear readiness signal before the aircraft leaves the gate.