FAA Powerplant Written Practice Test

What should be checked when overhauling a piston engine?

1. The condition of engine oil

2. Electrical system performance

3. The structural integrity of parts

4. Fuel quality

The correct answer is: The structural integrity of parts

When overhauling a piston engine, it is crucial to check the structural integrity of parts. This is because an overhaul involves disassembling the engine to inspect, clean, and replace any worn components. The structural integrity ensures that all components, such as the crankcase, pistons, connecting rods, and cylinder heads, meet safety and performance standards. Any signs of wear, cracks, or fatigue in these components can lead to catastrophic failure if not addressed during the overhaul process. During this procedure, emphasis is placed on the mechanical aspects of the engine where structural integrity is essential for the safe and effective operation of the engine once it is reassembled. Other factors like engine oil condition, electrical system performance, and fuel quality are important for overall engine performance but are not the primary focus during an overhaul, which specifically targets the physical components of the engine itself.