BETHEL, AK, USA
N20024
CESSNA 172M
DURING CRUISE FLIGHT THE PILOT HEARD A LOUD POP IN THE ENGINE COMPARTMENT AND THE ENGINE STOPPED PRODUCING POWER. DURING THE SUBSEQUENT FORCED LANDING ON THE TUNDRA, THE AIRPLANE NOSED OVER AND RECEIVED SUBSTANTIAL DAMAGE. EXAMINATION OF THE ENGINE REVEALED THAT THE CRANKSHAFT TIMING GEAR, PART NUMBER LW-15269, WAS EXTREMELY WORN AND ALL BUT NINE OF THE GEAR TEETH WERE MISSING. ACCORDING TO TEXTRON LYCOMING, THE GEAR WAS THE ORIGINAL MANUFACTURED GEAR.
A POWER LOSS OVER UNSUITABLE TERRAIN WHICH RESULTED IN A NOSE OVER.
Source: NTSB Aviation Accident Database
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