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NTSB Report
February 18, 1988 · Stinson 108 · N6939M
Oswego, NY
Overview
Report Status
Preliminary report
Event Type
Accident
Date
February 18, 1988
Injury Outcomes
1 injury (1 minor injury)
Location
Oswego, NY
Aircraft
Stinson 108
Tail Number
N6939M
Operator
Robert Lyman
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
NYC88LA090
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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time16:00 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftStinson 108
Tail NumberN6939M
Aircraft CategoryAir
DamageSubstantial
OperatorRobert Lyman
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6A4-150 · Reciprocating · 150
Seats4
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 57 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 8 kt, gusting 8 kt
Visibility15 sm
CeilingNone
Temperature / Dew Point39 C / 0 C
Altimeter29.00 inHg
Weather SourcePILO