What is the primary purpose of the hydraulic system in a landing gear operation?

The primary purpose of the hydraulic system in a landing gear operation is to provide hydraulic pressure for gear movement. This is essential for the correct extension and retraction of the landing gear during takeoff and landing phases of flight. The hydraulic system generates the necessary force to operate the landing gear mechanisms, allowing them to move smoothly and efficiently in and out of their respective bays.

While other systems in the aircraft may also depend on hydraulic power, such as flight control surfaces and brakes, the direct correlation of hydraulic pressure to the actuation of the landing gear makes this function critical. When the pilot commands the landing gear to extend or retract, the hydraulic system engages to perform this task, distinguishing it from other functions such as securing the gear or managing cabin pressure, which do not directly involve hydraulic movement.