Which option indicates a component not included in the pre-flight checks for the interphone/PA system?

Which option indicates a component not included in the pre-flight checks for the interphone/PA system?

• A. Passenger seating arrangement
• B. Interphone handsets
• C. Master call light panels
• D. Chimes

Answer: (A)

When checking the interphone/PA system before flight, focus is on what actually carries and signals communications. Interphone handsets are tested to ensure each one works and connects properly. Master call light panels are inspected so that they illuminate correctly when a call is placed and reset as needed. Chimes are checked to confirm audible alerts occur in the right places and at appropriate volumes. The passenger seating arrangement, while important for safety and service planning, does not affect the interphone/PA system’s operation and isn’t part of its functional pre-flight checks.

When checking the interphone/PA system before flight, focus is on what actually carries and signals communications. Interphone handsets are tested to ensure each one works and connects properly. Master call light panels are inspected so that they illuminate correctly when a call is placed and reset as needed. Chimes are checked to confirm audible alerts occur in the right places and at appropriate volumes. The passenger seating arrangement, while important for safety and service planning, does not affect the interphone/PA system’s operation and isn’t part of its functional pre-flight checks.