Which interphone code corresponds to 'Cabin ready to FD'?

• A. Code 29
• B. Code 1
• C. Code 30
• D. Code 22

Answer: (C)

Interphone codes are quick, standardized signals used by cabin crew to communicate status to the flight deck. Saying that the cabin is ready to FD means the crew has completed their checks and is prepared for the flight deck to proceed or provide further instructions. The specific code that matches this readiness status is the one assigned as 30. Using this code allows the flight deck to know immediately that the cabin is prepared for the next step without needing a verbal call. The other numbers correspond to different signals for other situations, so they do not convey the exact readiness to communicate with the flight deck.