In the event of a ground incident leading to propeller sudden stoppage, what inspection is required?

In the event of a ground incident that causes a sudden stoppage of the propeller, a crankshaft runout inspection is necessary. This is because a sudden stoppage can lead to severe stress on the crankshaft and its associated components, potentially resulting in misalignment or damage.

During a crankshaft runout inspection, technicians measure the alignment of the crankshaft to ensure it has not been bent or distorted due to the force generated by the sudden stoppage. This inspection is crucial for maintaining the integrity of the engine and ensuring its continued safe operation.

While other inspections might be relevant in a broader maintenance context, they are less directly related to the specific issues that could arise from a sudden propeller stoppage. For instance, checking the electrical system may be important for overall aircraft safety but does not directly address the mechanical consequences of such an incident. Similarly, while fuel line and flight controls may also need inspections in other scenarios, they do not assess the immediate risk to the engine that a crankshaft inspection would cover after the propeller has stopped abruptly.