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NTSB Report
May 8, 1992 · Cessna 150F · N8081S
Eldon, MO
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 8, 1992
Injury Outcomes
No injuries (2 uninjured)
Location
Eldon, MO
Aircraft
Cessna 150F
Tail Number
N8081S
Operator
Clyde Ditto
Injuries
None
Aircraft Damage
Substantial
NTSB Number
CHI92LA146
THE ACCIDENT AIRPLANE LOST PARTIAL ENGINE POWER WHEN THE EXHAUST VALVE IN THE NUMBER ONE CYLINDER BECAME STUCK. THE PILOT STARTED AN EMERGENCY DESCENT TOWARD A FORCED LANDING AREA AND ATTEMPTED TO TROUBLESHOOT THE ENGINE PROBLEM. HE REGAINED LEVEL FLIGHT OVER A VALLEY FLOOR BUT BELOW THE ELEVATION OF THE SURROUNDING TERRAIN. ENGINE OPERATION AT FULL THROTTLE RESULTED IN LESS THAN FULL POWER OUTPUT. WHEN HE ATTEMPTED TO CLIMB OUT OF THE VALLEY HE WAS UNABLE TO MAINTAIN CLEARANCE FROM OBSTRUCTIONS AND TERRAIN. HE FLEW THROUGH AND BROKE A POWER TRANSMISSION LINE. HE FLEW TOWARD LOWER TERRAIN AND LANDED IN AN OPEN FIELD. HE COLLIDED WITH A DITCH DURING THE FORCED LANDING GROUND ROLL.
NTSB Probable Cause
A BINDING EXHAUST VALVE RESULTING IN A PARTIAL LOSS OF ENGINE POWER. FACTORS IN THE ACCIDENT ARE RISING TERRAIN CONDITIONS, INADEQUATE AIRCRAFT CLIMB CAPABILITY, AND A DITCH IN THE FORCED LANDING AREA.
Full Narrative
THE ACCIDENT AIRPLANE LOST PARTIAL ENGINE POWER WHEN THE EXHAUST VALVE IN THE NUMBER ONE CYLINDER BECAME STUCK. THE PILOT STARTED AN EMERGENCY DESCENT TOWARD A FORCED LANDING AREA AND ATTEMPTED TO TROUBLESHOOT THE ENGINE PROBLEM. HE REGAINED LEVEL FLIGHT OVER A VALLEY FLOOR BUT BELOW THE ELEVATION OF THE SURROUNDING TERRAIN. ENGINE OPERATION AT FULL THROTTLE RESULTED IN LESS THAN FULL POWER OUTPUT. WHEN HE ATTEMPTED TO CLIMB OUT OF THE VALLEY HE WAS UNABLE TO MAINTAIN CLEARANCE FROM OBSTRUCTIONS AND TERRAIN. HE FLEW THROUGH AND BROKE A POWER TRANSMISSION LINE. HE FLEW TOWARD LOWER TERRAIN AND LANDED IN AN OPEN FIELD. HE COLLIDED WITH A DITCH DURING THE FORCED LANDING GROUND ROLL.
Flight
Event TypeAccident
Event Time16:00 CDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150F
Tail NumberN8081S
Aircraft CategoryAir
DamageSubstantial
OperatorClyde Ditto
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200-A · Reciprocating · 100
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 35 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 5 kt
Visibility20 sm
CeilingNone
Temperature / Dew Point36 C
Altimeter29.00 inHg
Observation Time21:45
Weather SourceWFAC