Rotation of the Controllable Pitch Propeller (CPP) blades is achieved through axial movement of what component in the hub body assembly?

Correct Answer: Option D — The crosshead

In a controllable pitch propeller (CPP) hub, the crosshead is the mechanical link between the hydraulic servomotor piston and the blade crankpins. As the servomotor moves the crosshead axially, the crankpins translate this linear motion into rotational movement of the propeller blades, thereby changing the pitch.