On the Flight Deck Access Panel, what color light indicates that access has been denied?

On the Flight Deck Access Panel, what color light indicates that access has been denied?

• A. Red
• B. Blue
• C. Green
• D. White

Answer: (A)

The color red on the Flight Deck Access Panel signals that access is denied. Red is used as a clear, immediate cue for prohibition, so when you see red, it means entry to the flight deck is not allowed at that moment and the door remains secured. In practice, this visual cue helps crew quickly identify the security status and respond accordingly, rather than trying to force entry. (Green, blue, or white would indicate other states, such as granted access or different status conditions, but red specifically denotes denial.)

The color red on the Flight Deck Access Panel signals that access is denied. Red is used as a clear, immediate cue for prohibition, so when you see red, it means entry to the flight deck is not allowed at that moment and the door remains secured. In practice, this visual cue helps crew quickly identify the security status and respond accordingly, rather than trying to force entry. (Green, blue, or white would indicate other states, such as granted access or different status conditions, but red specifically denotes denial.)