In the ON position, what do the HYD PUMPS switches do to the depressurization valve?

• A. Close the valve to stop flow
• B. De-energize the valve to allow pump pressure
• C. Activate the emergency fluid reserve
• D. Monitor fluid levels in the system

Answer: (B)

In the ON position, the HYD PUMPS switches indeed de-energize the depressurization valve, allowing pump pressure to build up in the hydraulic system. When the depressurization valve is de-energized, it means that it is in a state that does not restrict flow from the hydraulic pumps to the system. This is crucial because the hydraulic pumps need to generate sufficient pressure for the hydraulic system to function efficiently. By allowing the pump pressure to flow freely without being counteracted by a closed valve, the system can operate as intended, ensuring that components like actuators and control surfaces receive the necessary hydraulic force for their operation.

In contrast, if the valve were energized, it would be closed, impeding the flow and preventing the hydraulic system from reaching the required operational pressures. Thus, the proper operation of the HYD PUMPS switches in this scenario is essential for maintaining effective hydraulic pressure and system performance.