FLOYDADA, TX, USA
N17AT
BEECH 95
WHILE THE AIRPLANE WAS AT CRUISE, THE RIGHT PROPELLER SPINNER FELL OFF. THREE OR FOUR MINUTES LATER, THE RIGHT PROPELLER CAME OFF AND CUT INTO THE NOSE OF THE AIRPLANE. WITH NO ELECTRICAL POWER, AND DETERIORATED AIRPLANE CONTROL, THE PILOT MADE A WHEELS-UP LANDING ON THE DESTINATION AIRPORT. THE RIGHT PROPELLER AND THE CENTER OF THE STARTER RING WERE NOT RECOVERED. FIVE OF THE PROPELLER ATTACHMENT BOLTS REMAINED IN THE ENGINE CRANKSHAFT FLANGE. LABORATORY VISUAL INSPECTION INDICATED FOUR OF THESE BOLTS FAILED FROM FATIGUE AND THE FIFTH FAILED FROM OVERLOAD.
FAILURE OF THE PROPELLER ATTACHMENT BOLTS DUE TO FATIGUE IN FOUR OF THE BOLTS AND OVERLOAD IN ANOTHER. A CONTRIBUTING FACTOR WAS THE LOSS OF ELECTRICAL POWER AND THE DETERIORATED AIRPLANE CONTROL/PREFORMANCE.
Source: NTSB Aviation Accident Database
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