Which term describes an unexpected yaw motion that is not commanded by the flight crew?

• A. Uncommanded Yaw Motion
• B. Rudder bias due to autopilot
• C. Gentle yaw management
• D. Coordinated turn response

Answer: (A)

Yaw is rotation about the aircraft’s vertical axis. When a turn or heading change is driven by the pilot’s control inputs, that’s a commanded yaw. An uncommanded yaw motion means the aircraft yaws without any crew request, signaling a fault or unintended actuation in the flight-control system. This term covers any situation where surfaces or actuators move and cause yaw on their own, such as a rudder actuator bias or an autopilot/yaw damper issue, rather than a deliberate pilot input.

That makes the other options less appropriate: one describes a specific cause (a rudder bias introduced by the autopilot) rather than the general phenomenon of a yaw occurring without command, another isn’t a standard term for this situation, and the last describes a properly coordinated turn, which by definition is commanded and controlled by the crew, not uncommanded.