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NTSB Report
September 1, 1989 · Stinson 108 · N97628
Cool, CA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 1, 1989
Injury Outcomes
No injuries (1 uninjured)
Location
Cool, CA
Aircraft
Stinson 108
Tail Number
N97628
Operator
Cassen Gary A
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX89LA298
WHILE CLIMBING TO CRUISE ALTITUDE, THE ENGINE SUSTAINED A LOSS OF POWER. UNABLE TO MAINTAIN ALTITUDE, THE PILOT ELECTED TO LAND ON AN ACCESS ROAD. THE LANDING WAS UNEVENTFUL, BUT DURING THE LANDING ROLL-OUT, THE LEFT WHEEL PANT STRUCK A ROAD MARKER. THE AIRPLANE THEN YAWED TO THE LEFT, EXITED THE ROADWAY, AND WENT THRU A BARBED WIRE FENCE AND ONTO A DIRT FIELD. AN ENGINE EXAMINATION DISCLOSED THE #2 PISTON WAS DESTROYED. THE PISTON WAS NOT IDENTIFIED AS BEING THE CORRECT ONE FOR THE ENGINE. THE ENGINE HAD ACCRUED 145 HOURS SINCE MAJOR OVERHAUL. THE OVERHAUL WAS PERFORMED BY AN A&P MECHANIC.
NTSB Probable Cause
FAILURE OF THE #2 PISTON. FAILURE OF THE MECHANIC TO PROPERLY OVERHAUL THE ENGINE WAS A RELATED FACTOR.
Full Narrative
WHILE CLIMBING TO CRUISE ALTITUDE, THE ENGINE SUSTAINED A LOSS OF POWER. UNABLE TO MAINTAIN ALTITUDE, THE PILOT ELECTED TO LAND ON AN ACCESS ROAD. THE LANDING WAS UNEVENTFUL, BUT DURING THE LANDING ROLL-OUT, THE LEFT WHEEL PANT STRUCK A ROAD MARKER. THE AIRPLANE THEN YAWED TO THE LEFT, EXITED THE ROADWAY, AND WENT THRU A BARBED WIRE FENCE AND ONTO A DIRT FIELD. AN ENGINE EXAMINATION DISCLOSED THE #2 PISTON WAS DESTROYED. THE PISTON WAS NOT IDENTIFIED AS BEING THE CORRECT ONE FOR THE ENGINE. THE ENGINE HAD ACCRUED 145 HOURS SINCE MAJOR OVERHAUL. THE OVERHAUL WAS PERFORMED BY AN A&P MECHANIC.
Flight
Event TypeAccident
Event Time10:38 PDT
Nearest AirportAUBURN (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftStinson 108
Tail NumberN97628
Aircraft CategoryAir
DamageSubstantial
OperatorCassen Gary A
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6A4-165 · Reciprocating · 165
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 26 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 10 kt
Visibility50 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter29.00 inHg
Weather SourcePILO