A ground incident resulting in propeller sudden stoppage requires which type of inspection?

When a ground incident results in the sudden stoppage of a propeller, it is crucial to perform a crankshaft runout inspection. This type of inspection is necessary because a sudden stop can indicate that there has been a significant impact or stress on the engine components, particularly the crankshaft. Ensuring that the crankshaft is within the specified tolerances for runout is essential to assess whether it has been damaged or is functioning properly.

Proper crankshaft alignment and condition are critical for the overall performance and safety of the engine. If the crankshaft is out of tolerance, it can lead to further mechanical issues, not just for the crankshaft itself but also affecting the propeller and the entire propulsion system. Thus, performing this inspection helps in identifying any immediate mechanical issues that have arisen from the incident, ensuring that any necessary repairs can be made before the aircraft is returned to service.

The other options, such as engine oil inspection or propeller recalibration, may be relevant in other contexts but do not specifically address the immediate need to evaluate the integrity of the crankshaft, which is where the potential issue lies following a propeller stoppage. Additionally, an airframe structural inspection may be important, but it does not target the specific mechanical concerns related to