Which hydraulic system powers the tail rotor servo actuator?

• A. No.1 hydraulic system
• B. No.2 hydraulic system
• C. No.1 and No.2 hydraulic systems
• D. 28VDC

Answer: (A)

The tail rotor servo actuator is powered by the No.1 hydraulic system, which is specifically designed to support various critical functions within the aircraft, including the tail rotor system. In the TH-73A, the hydraulic systems are configured to provide redundancy and support multiple flight controls, but the tail rotor servo actuator relies primarily on the No.1 hydraulic system for its operation. This design ensures that the crucial functions required for controlling the tail rotor are maintained efficiently and effectively. Utilizing the No.1 hydraulic system helps to streamline performance and manage the power allocation for aircraft maneuvers while ensuring safety and reliability during flight operations.