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NTSB Report
March 17, 1987 · Stinson 108-1 · N97115
Rio Vista, CA
Overview
Report Status
Preliminary report
Event Type
Accident
Date
March 17, 1987
Injury Outcomes
No injuries (1 uninjured)
Location
Rio Vista, CA
Aircraft
Stinson 108-1
Tail Number
N97115
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX87LA148
THE AIRCRAFT NOSED OVER IN SOFT SOIL AFTER A FORCED LANDING. THE AIRCRAFT'S ENGINE FAILED DURING THE DEPARTURE CLIMB AND THE PILOT WAS UNABLE TO RESTART IT. THE PILOT ACCOMPLISHED A FORCED LANDING TO A FIELD. THE AIRCRAFT NOSED OVER WHEN THE NOSE GEAR BECAME BOGGED IN SOFT SOIL. THE POWERPLANT WAS DISASSEMBLED AND EXAMINED. DURING THE DISASSEMBLY THE CRANKSHAFT WAS DISCOVERED TO BE FRACTURED BETWEEN THE NUMBER ONE AND TWO CYLINDER JOURNALS. EXAMINATION OF THE AIRCRAFT AIRFRAME AND ENGINE LOGBOOKS REVEALED THAT THE CRANKSHAFT WAS INSTALLED ON MARCH 28, 1984 WHEN THE ENGINE WAS OVERHAULED. THE AIRCRAFT HAD ACCUMULATED A TOTAL OF 54 FLIGHT HOURS SINCE THE ENGINE OVERHAUL. IT COULD NOT BE DETERMINED IF THE CRANKSHAFT WAS NEW OR RECONDITIONED AT THE TIME OF INSTALLATION.
Full Narrative
THE AIRCRAFT NOSED OVER IN SOFT SOIL AFTER A FORCED LANDING. THE AIRCRAFT'S ENGINE FAILED DURING THE DEPARTURE CLIMB AND THE PILOT WAS UNABLE TO RESTART IT. THE PILOT ACCOMPLISHED A FORCED LANDING TO A FIELD. THE AIRCRAFT NOSED OVER WHEN THE NOSE GEAR BECAME BOGGED IN SOFT SOIL. THE POWERPLANT WAS DISASSEMBLED AND EXAMINED. DURING THE DISASSEMBLY THE CRANKSHAFT WAS DISCOVERED TO BE FRACTURED BETWEEN THE NUMBER ONE AND TWO CYLINDER JOURNALS. EXAMINATION OF THE AIRCRAFT AIRFRAME AND ENGINE LOGBOOKS REVEALED THAT THE CRANKSHAFT WAS INSTALLED ON MARCH 28, 1984 WHEN THE ENGINE WAS OVERHAULED. THE AIRCRAFT HAD ACCUMULATED A TOTAL OF 54 FLIGHT HOURS SINCE THE ENGINE OVERHAUL. IT COULD NOT BE DETERMINED IF THE CRANKSHAFT WAS NEW OR RECONDITIONED AT THE TIME OF INSTALLATION.
Flight
Event TypeAccident
Event Time14:15 PST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftStinson 108-1
Tail NumberN97115
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsFranklin · 6A4-150 · Reciprocating · 150
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 64 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind240° @ 15 kt
Visibility25 sm
CeilingOvercast 22000 ft
Temperature / Dew Point66 F / 50
Altimeter29.00 inHg
Observation Time21:55
Weather SourceWFAC