Under (O) Procedures, which statement is true regarding who may perform certain functions?

• A. Normally completed by maintenance
• B. Usually not performed by anyone else
• C. Other personnel may be authorized to perform certain functions
• D. Flights underway cannot perform procedures

Answer: (D)

In this area, procedures define who is allowed to perform specific tasks and when they may be performed, emphasizing safety and proper authorization. The statement that flights underway cannot perform certain procedures sets a clear boundary: while the aircraft is in the air, those functions are not to be carried out by any personnel because access, supervision, and safe execution of the task are not available. Tasks that require ground conditions, tools, or oversight are reserved for when the aircraft is on the ground and properly secured, with the appropriate personnel present. This framing helps ensure that only the right people perform the right tasks at the right time, reducing risk during flight.