CORONA, CA, USA
N74463
GRUMMAN AA-5B
DURING MAINT OF THE ENG, & JUST BEFORE THE ANNUAL INSPECTION WAS SIGNED OFF, SOMEONE PARTIALLY LOOSENED & THEN ATTEMPTED TO TIGHTEN THE BOLT SECURING THE CRANKSHAFT GEAR TO THE CRANKSHAFT. THE OLD LOCKPLATE WAS NOT REPLACED & WAS NOT PROPERLY SECURED ABOUT THE BOLT. AS A RESULT OF A LOOSE BOLT THE DOWEL PIN, ALIGNING THE GEAR WITH THE CRANKSHAFT, THE GEAR SHIFTED POSITION & THE ENGINE STOPPED. THE PLT FAILED TO LOWER THE WING FLAPS, & STRUCK A DIRT DITCH SHORT OF HIS INTENDED EMERG LANDING SITE.
Source: NTSB Aviation Accident Database
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