MARSHALL, MO, USA
N9639J
CESSNA T188C
THE ENG FAILED WHILE ENROUTE TO SPRAY. THE ACFT WAS OBSERVED TO JETTISON ITS LOAD PRIOR TO IMPACTING TREES IN A WOODED PASTURE. METALLURGICAL EXAMINATION REVEALED THAT THE CRANKSHAFT, P/N631716, HAD FRACTURED FROM FATIGUE PROGRESSION THROUGH THE FORWARD CHEEK OF THE #3 MAIN BEARING JOURNAL. INITIATION HAD OCCURRED 0.047 INCHES BELOW THE FORWARD RADIUS SURFACE. NO METALLURGICAL ABNORMALITIES WERE FOUND AT THE ORIGIN SITE.
Source: NTSB Aviation Accident Database
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