What does a “run-up” entail in engine inspections?

• A. Cooling down the engine before inspection
• B. A procedure to check engine performance
• C. Checking oil levels
• D. Inspecting airframe integrity

Answer: (B)

A "run-up" in engine inspections is a crucial procedure to evaluate the performance of the engine while it's operating under conditions that simulate normal flight. This involves running the engine at various power settings to verify that all systems are functioning correctly, including performance metrics like RPM, engine temperatures, and other operational parameters. By doing this, inspectors can identify any irregularities or potential issues that might not be evident during a static inspection.

This procedure allows maintenance personnel to observe engine behavior and sounds that could indicate mechanical problems. Overall, a run-up is a proactive measure that ensures the engine is in optimal working condition before flight, making it an integral part of maintaining aviation safety.