11.   One of three hydraulic power units had overheated, and the pilots switched to a backup.

12.   One of three hydraulic power units had overheated, and the pilots switched to a backup circuit.

13.   One of three hydraulic power units overheated, and the pilots switched to a backup controller to cool it before shutting down each unit as planned.

14.   The bellcranks, attached to a hydraulic power control unit, help move the elevators at the rear of the plane.