NTSB Identification: MKC84LA038.
The docket is stored on NTSB microfiche number 23847.
Accident occurred Friday, December 16, 1983 in SIKESTON, MO
Aircraft: PIPER PA-32-260, registration: N321HF
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

THE ACFT NOSE GEAR COLLAPSED DURING A FORCED LANDING AFTER ENGINE FAILURE. DURING A X-COUNTRY FLT THE ENGINE POPPED AND QUIT. THE PLT APPROACHED A ROAD TO LAND BUT SAW A VEHICLE DURING APPROACH AND VEERED OFF INTO A FIELD. POST ACCIDENT INVESTIGATION REVEALED A BROKEN CRANKSHAFT WHICH HAD FAILED AT THE NUMBER 4 BEARING JOURNAL CHEEK. THE SHAFT EXHIBITED SEVERAL GOUGES EXTENDING THROUGH ABOUT 90 DEGREES OF THE CIRCUMFERENCE. THE FATIGUE INITIATION AREA APPEARED TO BE LOCATED IN ONE OF THESE GOUGES. THERE WAS NO LOG BOOK ENTRY TO INDICATE A PREVIOUS SUDDEN STOPPAGE OF THE ENGINE BUT NUMEROUS CYLINDER CHANGES OVER THE ENGINE LIFE WERE NOTED.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ENGINE ASSEMBLY,CRANKSHAFT..FAILURE,TOTAL

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ENGINE ASSEMBLY,CRANKSHAFT..FATIGUE


Contributing Factors

LANDING GEAR,NOSE GEAR ASSEMBLY..OVERLOAD

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