Under what condition can the Electric Suction Boost pumps be shut off while operating hydraulic systems?

The Electric Suction Boost pumps are critical components in the hydraulic systems of the C-5 aircraft. These pumps maintain adequate hydraulic pressure to ensure the proper operation of hydraulic systems, especially during low demand or when the engine-driven pumps may not be able to provide sufficient pressure. As such, they should remain operational whenever hydraulic systems are in use to prevent potential failures and maintain system integrity.

Shutting off the Electric Suction Boost pumps while the hydraulic systems are operating can lead to a drop in hydraulic pressure, which may cause inconsistency or failure in the operation of essential systems. It is vital for the safety and reliability of the aircraft that these pumps be kept on during all phases of operation, ensuring that hydraulic power is stable and available as required.