What should be checked before starting the FADPU?

Before starting the FADPU (Fuel and Air Distribution Pump Unit), checking the HPU (Hydraulic Power Unit) valves is crucial because these valves control the flow of hydraulic fluid necessary for the operation of the FADPU. Ensuring that the HPU valves are in the correct position helps maintain proper pressure and flow rates essential for the safe and efficient operation of the system.

Checking HPU valves is a standard safety practice that helps prevent potential malfunctions or hazardous situations that could arise from incorrect valve positions. This action is a critical part of the pre-startup procedure, as hydraulic systems depend significantly on the correct functioning of these components to operate reliably. If the valves are not correctly set, it can lead to issues such as pump failure, leaks, or unsafe operating conditions.

While assessing fuel levels, electrical connections, and emergency equipment are also important safety practices to ensure overall system readiness, they do not directly address the immediate operational readiness of the FADPU itself as the condition of the HPU valves does.