Which check is typically part of an engine run-up?

An engine run-up is a critical procedure performed during pre-flight checks where the engine is operated at various RPMs to ensure it's functioning correctly before flight. During this process, a fuel flow check is essential to verify that the engine is receiving the correct amount of fuel. It ensures that the fuel system is functioning properly and that no blockages or leaks are present, which could lead to engine failure in flight.

Fuel flow checks help monitor the performance of the engine and confirm that it is meeting the manufacturer’s specifications for fuel delivery. This can include checking fuel pressure and ensuring that the fuel metering system is operating effectively. It is a routine aspect of engine assessments to ensure reliability and performance.

The other options—compressor blade wear assessment, engine painting inspection, and exterior clean-up—while important in maintenance procedures, are not typically performed during the run-up phase. Compressor blade assessments may take place during more detailed inspections or maintenance checks but not in real-time operation. An engine painting inspection would relate to maintenance aesthetics and protective measures rather than engine operation, and an exterior clean-up is not a performance evaluation. Thus, the fuel flow check is the relevant procedure during an engine run-up.