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NTSB Report
March 24, 1991 · Cessna 150F · N383VU
Floresville, TX
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 24, 1991
Injury Outcomes
1 injury (1 minor injury)
Location
Floresville, TX
Aircraft
Cessna 150F
Tail Number
N383VU
Operator
Airpline Pilot Institute
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
FTW91LA056
DURING A DAY CROSS COUNTRY FLIGHT, THE STUDENT PILOT BEGAN AN APPROVED DESCENT FOR AN APPROACH TO SAN ANTONIO INTERNATIONAL AIRPORT, SAN ANTONIO, TEXAS, THE ENGINE LOST PARTIAL POWER DUE TO A STUCK VALVE IN THE NUMBER 2 CYLINDER STUDENT PILOT WAS VECTORED TO A PRIVATE AIRSTRIP, HOWEVER, SHE COULD NOT EXTEND THE GLIDE FAR ENOUGH TO REACH THE AIRSTRIP DUE TO A TAIL WIND ON HER SELECTED FINAL APPROACH COURSE. THE AIRPLANE STRUCK A TREE AND FENCE DURING THE LANDING CAUSING THE AIRPLANE TO PITCH OVER INVERTED. SIGNIFICANT MAINTENANCE HAD BEEN PERFORMED PRIOR TO THE FLIGHT AND THERE WAS AT LEAST ONE INSTANCE OF A POWER LOSS DURING A PREVIOUS TAKEOFF. THERE WERE 2 PREVIOUS INCIDENTS WHERE THE NUMBER 2 CYLINDER EXHAUST VALVE STUCK IN THE HALF OPEN POSITION.
NTSB Probable Cause
THE FAILURE OF THE ENGINE DUE TO A JAMMED VALVE, INCORRECT MAINTENANCE PROCEDURES, AND THE PILOT'S IMPROPER COMPENSATION FOR THE EXISTING WIND CONDITIONS. A FACTOR WAS THE TAILWIND.
Full Narrative
DURING A DAY CROSS COUNTRY FLIGHT, THE STUDENT PILOT BEGAN AN APPROVED DESCENT FOR AN APPROACH TO SAN ANTONIO INTERNATIONAL AIRPORT, SAN ANTONIO, TEXAS, THE ENGINE LOST PARTIAL POWER DUE TO A STUCK VALVE IN THE NUMBER 2 CYLINDER STUDENT PILOT WAS VECTORED TO A PRIVATE AIRSTRIP, HOWEVER, SHE COULD NOT EXTEND THE GLIDE FAR ENOUGH TO REACH THE AIRSTRIP DUE TO A TAIL WIND ON HER SELECTED FINAL APPROACH COURSE. THE AIRPLANE STRUCK A TREE AND FENCE DURING THE LANDING CAUSING THE AIRPLANE TO PITCH OVER INVERTED. SIGNIFICANT MAINTENANCE HAD BEEN PERFORMED PRIOR TO THE FLIGHT AND THERE WAS AT LEAST ONE INSTANCE OF A POWER LOSS DURING A PREVIOUS TAKEOFF. THERE WERE 2 PREVIOUS INCIDENTS WHERE THE NUMBER 2 CYLINDER EXHAUST VALVE STUCK IN THE HALF OPEN POSITION.
Flight
Event TypeAccident
Event Time10:51 CST
Nearest AirportJohn Connolly (0nm N)
Runway11
Runway Length4050 ft
Runway Width60 ft
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150F
Tail NumberN383VU
Aircraft CategoryAir
DamageSubstantial
OperatorAirpline Pilot Institute
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200A · Reciprocating · 100
Seats2
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 50 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 15 kt
Visibility20 sm
CeilingBroken clouds 15000 ft
Temperature / Dew Point0 C
Altimeter29.00 inHg
Observation Time16:00
Weather SourceWFAC