NTSB Identification: ATL84IA135.
The docket is stored on NTSB microfiche number 26010.
Nonscheduled 14 CFR
Incident occurred Friday, March 30, 1984 in CLAYTON, NC
Aircraft: PIPER PA-28R-200, registration: N4999S
Injuries: 3 Uninjured.

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

DURING FLT, THE PLT & A PASSENGER NOTED A LOSS OF ENG POWER ACCOMPANIED BY A METALLIC SOUND. SUBSEQUENTLY, A WHEELS-UP FORCED LANDING WAS MADE IN A PLOWED FIELD. AN ENG TEARDOWN REVEALED THAT THE CRANKSHAFT, P/N 54297-1, HAD FAILED FROM FATIGUE. A METALLURGICAL EXAM REVEALED THAT THE FATIGUE CRACK ORIGINATED AT A MACHINE GROOVE NORMALLY ASSOCIATED WITH OVERHAUL OF THE CRANKSHAFT. THE CRANKSHAFT HAD 130 FLT HRS SINCE IT HAD BEEN RECONDITIONED BY AN FAA APPROVED REPAIR STATION.

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

ENGINE ASSEMBLY,CRANKSHAFT..PREVIOUS DAMAGE

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

MAINTENANCE,MAJOR REPAIR..IMPROPER..OTHER MAINTENANCE PERSONNEL

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

ENGINE ASSEMBLY,CRANKSHAFT..FATIGUE


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