What should be done to the pilot’s arms during a pilot incapacitation drill?

During a pilot incapacitation drill, the focus is on ensuring that the incapacitated pilot's arms are secured in a way that promotes safety and minimizes interference with the flight controls. Crossing the arms and securing them behind the shoulder harness is the best approach because it prevents them from moving freely during any abrupt maneuvers or turbulence. This method reduces the risk of the incapacitated pilot accidentally interfering with the operational controls or causing a distraction to the other pilot.

Securing the arms in this manner also ensures that they do not pose a hazard to the flight crew or compromise the safety of the flight. It allows for the other pilot to have a clear area to operate without the risk of unintended input from the incapacitated pilot. This procedure is integral in maintaining control of the aircraft and ensuring the safety of all on board.