NTSB Identification: NYC88LA090.
The docket is stored on NTSB microfiche number 37605.
Accident occurred Thursday, February 18, 1988 in OSWEGO, NY
Probable Cause Approval Date: 09/25/1989
Aircraft: STINSON 108, registration: N6939M
Injuries: 1 Minor.

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

DURING A LOCAL PLEASURE FLIGHT, A DECREASE IN ENGINE POWER WAS EXPERIENCED AND A PUFF OF SMOKE OBSERVED IN THE COCKPIT. THE PILOT APPLIED FULL POWER IN AN ATTEMPT TO RETURN TO THE AIRPORT, BUT REALIZED IT WAS NOT POSSIBLE. THE PILOT PUT THE AIRCRAFT DOWN IN AN OPEN SNOW COVERED FIELD. DURING THE LANDING ROLL OF ABOUT 125 FEET, THE AIRCRAFT FLIPPED OVER. THE CAUSE OF THE POWER LOSS WAS A BROKEN CONNECTING ROD ON THE #5 CYLINDER AND A NUT ON THE ROD END CAP HAD COME OFF.

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

ENGINE ASSEMBLY,CONNECTING ROD BOLT..MISSING

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

ENGINE ASSEMBLY,CONNECTING ROD CAP..LOOSE

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

ENGINE ASSEMBLY,CONNECTING ROD..FAILURE,TOTAL

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

ENGINE ASSEMBLY,CRANKCASE..PENETRATED


Contributing Factors

TERRAIN CONDITION..SNOW COVERED

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