Who determines which alternate seat a jumpseat passenger should occupy based on MEL?

The Pilot in Command (PIC) is responsible for the overall safety and operation of the flight, which includes making decisions regarding passengers and crew accommodations, such as assigning jumpseat passengers to their respective positions in compliance with the Minimum Equipment List (MEL). The MEL specifies which systems must be operational to ensure the safety of flight and may affect how and where passengers are seated, particularly in cases where weight and balance considerations or safety protocols come into play.

In this context, the PIC uses the MEL to assess the aircraft’s operational capacity and determine any necessary adjustments to seat assignments, ensuring compliance with regulatory and safety standards. This authority is critical, as the PIC has the ultimate responsibility for the safe operation of the aircraft and its occupants, which includes making these crucial decisions. Other roles, such as the co-pilot, Chief Flight Attendant, or flight engineer, may provide input or assistance in operational matters, but the final determination lies with the PIC.