Which system provides the hydraulic pressure needed for the landing gear emergency control system?

The hydraulic pressure needed for the landing gear emergency control system is provided by Hydraulic System 1. This particular system is designed to handle critical flight control functions, including the operation of the landing gear. During normal operations, Hydraulic System 1 supplies pressure to extend and retract the landing gear. If there is a failure in the primary hydraulic systems, the emergency controls typically utilize the pressure from Hydraulic System 1 to ensure the landing gear can be safely deployed or retracted.

Other hydraulic systems might support various aircraft functions, such as flight controls or brake systems, but for the specific purpose of the landing gear emergency operation, Hydraulic System 1 is the designated source. This distinction underscores the redundancy and reliability built into the aircraft's design to enhance safety and operational integrity in various scenarios.