NTSB Identification: DEN84LA221.
The docket is stored on NTSB microfiche number 25624.
Accident occurred Friday, July 20, 1984 in GLENDO, WY
Aircraft: PIPER 28RT-201T, registration: N8168Q
Injuries: 1 Minor,3 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 WAS DAMAGED IN A FORCED LANDING IN A WOODED AREA AFTER THE ENGINE FAILED. THE PLT SAID THAT HE WAS CRUISING AT 7500 FT MSL WHEN WITHOUT WARNING THE ENGINE BEGAN MAKING NOISES AND THEN LOST OIL PRESSURE. AFTER THE LANDING THE ENGINEWAS EXAMINED AT THE DUFF ACFT CO. IN DENVER, CO. IT WAS FOUND THAT THE CRANKSHAFT HAD FAILED. DURING LABORATORY FAILURE ANAYSIS THESE CONCLUSIONS WERE DRAWN: FAILURE FROM FATIGUE AT LOW STRESS LEVELS & FATIGUE ORIGINATED ON THE WALLS OF THELURICATION HOLE WHERE COARSE MACHINE MARKS WERE PRESENT.

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:

INADEQUATE QUALITY CONTROL..MANUFACTURER

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

ENGINE ASSEMBLY,CRANKSHAFT..FATIGUE


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE


Contributing Factors

OBJECT..TREE(S)

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