If hydraulic power fails, the mechanism can be disconnected, placing the system in complete manual operation. Movement of the aileron control system begins when the control stick in the cockpit moves left or right. When the stick is moved, cables connected to the bell crank in the control stick housing are moved to operate the sector on the power mechanism. With the actuation of the sector, the power mechanism operates, transferring the movement to the mechanical linkage that operates the ailerons. The aileron power mechanism consists of two control valves, a dual-chambered hydraulic power cylinder, cable sectors, and a system of latches and related cranks.
Linkage connects the control valves in tandem.
The flight control hydraulic system powers one valve, and the other is powered by the utility hydraulic system. The power cylinder is a single tandem cylinder, composed of four chambers with pistons connected to a common shaft. Each of the two control valves operates on that portion of the power cylinder to which it is associated. Both hydraulic systems operate simultaneously, and each delivers 3,000-psi pressure to the mechanism. If one hydraulic system should fail, the other system will supply enough power to operate the ailerons at reduced hinge movement.