If it is necessary to prevent the rudder from moving while a repair is made on the steering system using the illustrated actuator __________. GS-0116

Correct Answer: Option C — secure the valves in the supply and return lines

To safely perform maintenance on a steering gear actuator, the hydraulic system must be isolated. Securing the supply and return valves prevents hydraulic fluid movement, effectively locking the rudder in position. This is a standard safety procedure to prevent accidental rudder movement while personnel are working on the steering gear.