When manually starting H-PBIT, how should the hydraulic pumps be turned on?

The hydraulic Power-Building Integration Test (H-PBIT) requires the hydraulic pumps to be turned on in a specific sequence and within a designated time frame. Turning on the pumps in sequence allows for a controlled buildup of hydraulic pressure and ensures that each system component is properly monitored during the test. This sequencing helps to verify the functionality of the hydraulic system and guarantees that no adverse interactions occur among the multiple pumps while they are operating.

The requirement to complete this sequencing within six seconds is crucial, as it enables the maintenance of consistent system conditions and promotes accurate diagnostics during the test. If the pumps are not engaged in a timely sequence, it could lead to erroneous readings or system responses that do not accurately reflect the state of the hydraulic systems.

Understanding this process is vital for ensuring the safe and effective operations of the hydraulic systems on the Embraer Regional Jet, making the correct sequence approach the preferred method during the H-PBIT procedure.