What happens to the flight control surfaces during a servo failure?

In the event of a servo failure, the flight control surfaces become unresponsive and do not move as required to control the aircraft. When the servo, which is responsible for actuating the flight control surfaces, fails, it can lead to a condition where those surfaces, such as ailerons, elevators, and rudders, can no longer receive commands from the flight control system or the pilot. This lack of response can severely impair the pilot's ability to maneuver the aircraft effectively, leading potentially to a dangerous situation.

Other outcomes, such as continuing to respond normally or only specific surfaces becoming unresponsive, do not accurately represent the typical consequences of a servo failure. Additionally, while backup systems are designed to provide redundancy, they may not always activate automatically or be present for every scenario of servo failure. Thus, the scenario of the flight control surfaces freezing in response to the servo malfunction is the most accurate.