What PSI should SYS 1 and/or SYS 4 indicate during operation?

During operation, the hydraulic systems on the C-5 aircraft, specifically SYS 1 and SYS 4, are required to maintain a hydraulic pressure within a specified range to ensure optimal performance and safety. The correct PSI range of 2850-3150 PSI indicates that the hydraulic systems are functioning properly and providing adequate hydraulic pressure for the aircraft's various systems, including flight control surfaces and landing gear.

Operating within this pressure range is crucial because it directly affects the efficiency and responsiveness of the aircraft's hydraulic systems. If the pressure were to fall below the lower threshold or exceed the upper limit, it could lead to inadequate performance, potential mechanical failures, or complications in the operation of hydraulic-dependent components, compromising safety and functionality. Therefore, maintaining a pressure of 2850-3150 PSI is essential for operational integrity in the C-5's hydraulic systems.