Which concept refers to an uncommanded yaw motion resulting from control system imbalance?

• A. Uncommanded Yaw Motion
• B. Automatic Rudder Lock
• C. Crosswind Correction
• D. Yaw Damper Failure

Answer: (A)

The main idea here is uncommanded yaw caused by imbalance in the control system. When the controls don’t share authority evenly, one control surface (or its actuator) can produce more moment than the other. That unequal force about the aircraft’s vertical axis creates a yaw motion that the pilot did not command. This can happen if hydraulic pressure to actuators is uneven, a servo or actuator sticks, or there’s a slight mismatch in how the actuators move, so the aircraft starts to yaw on its own. The situation is managed in flight by systems designed to damp yaw and by pilot inputs that re-balance the moment, such as using rudder trim and coordinated flight inputs while checking for any actuator or hydraulic issues. In contrast, automatic rudder lock would prevent rudder movement, crosswind correction is an intentional, commanded yaw to counter wind, and yaw damper failure describes loss of damping rather than an imbalance causing yaw.