On November 20, 1995, a Piper PA-22 (registration N5057Z) was involved in an aviation accident near Durham, NC. Investigators recorded the probable cause as: The aircraft mechanic's failure to follow engine overhaul procedures which resulted in the failure of the camshaft drive gear. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
Shortly after liftoff from a sod airstrip, the pilot experienced a complete loss of engine power. During the attempted forced landing, the airplane collided with trees. Examination revealed that the camshaft drive gear retention bolt lockplate tabs were not bent to secure the bolt. The engine had been overhauled one flight hour before the accident.
Overview
Shortly after liftoff from a sod airstrip, the pilot experienced a complete loss of engine power. During the subsequent attempted forced landing, the airplane collided with trees.
Engine Examination
Post-accident examination of the engine assembly revealed that the camshaft drive gear retention bolt lockplate tabs were not bent into position to secure the bolt. The lockplate tabs are designed to be bent over the bolt head to prevent loosening.
Maintenance Background
A review of the aircraft maintenance records showed that the engine had been overhauled one flight hour before the accident. No further details regarding the maintenance or the specific overhaul procedures were provided in the source.
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