Accident Details
The airplane experienced a catastrophic engine failure, prompting the pilot to execute an emergency landing near Panama City, Florida. During the flare, the left wing impacted a utility pole, resulting in substantial damage to the airplane.
Engine Examination
Examination of the engine revealed that the crankshaft had fractured at the connection rod thrust surface adjacent to the front fillet radius of the No. 6 crankpin journal.
Metallurgical Conclusion
Metallurgical examination concluded that the crankshaft fractured in fatigue at the connection rod thrust surface, adjacent to the front fillet radius of the No. 6 crankpin journal, due to high stress. The exact cause of the high stress remains undetermined.