What component failure results in the loss of power steering?

The loss of power steering is typically associated with the nose wheel assembly. Power steering systems in aircraft are designed to facilitate smoother and more controllable steering of the nose wheel during taxiing, takeoff, and landing. If there is a failure in the components related to the nose wheel, such as the steering mechanism or hydraulic system that assists with steering input, the aircraft would lose the ability to easily maneuver the nose wheel. This can lead to difficulties in directional control, especially at low speeds when precise steering is critical.

Other components listed, such as the tail rotor, propeller, and landing gear, do not have a direct impact on the power steering of the nose wheel. Each of these components serves different functions, such as propulsion and flight control, but they do not contribute to the steering mechanism that controls the aircraft's nose during ground operations. Therefore, the failure of the nose wheel assembly is specifically tied to the loss of power steering.