Which hydraulic system provides fluid for the landing gear?

• A. Hydraulic System A
• B. Standby hydraulic system
• C. Hydraulic System B
• D. Auxiliary hydraulic system

Answer: (A)

The correct answer is Hydraulic System A, as it is typically designated in many aircraft as the primary hydraulic system responsible for operating critical components, including the landing gear. This system usually has a higher capacity and is designed to handle the demands of essential flight operations, ensuring safe and reliable functionality when deploying or retracting the landing gear.

In most aircraft hydraulic architectures, each hydraulic system has specific functions. Hydraulic System A is often tasked with operating major systems like landing gear, brakes, and primary flight controls. The other systems mentioned, such as the standby hydraulic system and Auxiliary hydraulic system, tend to serve additional functions or as backups to maintain operational capability in case of a failure in the primary systems. This separation ensures that the landing gear can reliably extend and retract under various conditions.