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NTSB Report
October 31, 1992 · Cessna 150H · N6402S
Mt. Gilead, OH
Overview
Report Status
Probable Cause
Event Type
Accident
Date
October 31, 1992
Injury Outcomes
1 injury (1 serious injury)
Location
Mt. Gilead, OH
Aircraft
Cessna 150H
Tail Number
N6402S
Operator
George Wharton
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
NYC93LA031
THE PILOT WAS IN RADIO CONTACT WITH THE CONTROL TOWER AT THE DESTINATION AIRPORT AND IN A DESCENT FROM FIVE THOUSAND FEET TO TWO THOUSAND FEET IN PREPARATION FOR LANDING. SEVEN MILES SOUTH OF THE AIRPORT, THE AIRPLANE WAS OBSERVED, ON RADAR, FLYING AWAY FROM THE AIRPORT WHEN RADAR CONTACT WAS LOST. GROUND WITNESSES SAW THE AIRPLANE FLYING STRAIGHT AND LEVEL AT A LOW ALTITUDE OVER A WOODED AREA WHEN THE LEFT WING STRUCK A TREE. A TOXICOLOGY ON THE PILOT REVEALED CARBON MONOXIDE IN THE PILOT'S BLOOD. EXAMINATION OF THE LEFT HEATER/EXHAUST MUFFLER, THE SOURCE OF HEAT TO THE CABIN, SHOWED IT HAD DETERIORATED AND HAD THREE CRACKS. TWO CRACKS WHERE FOUND ON THE MUFFLER TUBE AND ONE ON THE FORWARD END PLATE. THE THREE CRACKS WERE INTERGRANULAR AND SHOWED SOME OXIDATION.
NTSB Probable Cause
PILOT INCAPACITATION DUE TO CARBON MONOXIDE GAS AS A RESULT OF CRACKS IN THE HEATER MUFFLER. A FACTOR IN THE ACCIDENT WAS THE PROGRESSIVE DETERIORATION OF THE LEFT HEATER MUFFLER.
Full Narrative
THE PILOT WAS IN RADIO CONTACT WITH THE CONTROL TOWER AT THE DESTINATION AIRPORT AND IN A DESCENT FROM FIVE THOUSAND FEET TO TWO THOUSAND FEET IN PREPARATION FOR LANDING. SEVEN MILES SOUTH OF THE AIRPORT, THE AIRPLANE WAS OBSERVED, ON RADAR, FLYING AWAY FROM THE AIRPORT WHEN RADAR CONTACT WAS LOST. GROUND WITNESSES SAW THE AIRPLANE FLYING STRAIGHT AND LEVEL AT A LOW ALTITUDE OVER A WOODED AREA WHEN THE LEFT WING STRUCK A TREE. A TOXICOLOGY ON THE PILOT REVEALED CARBON MONOXIDE IN THE PILOT'S BLOOD. EXAMINATION OF THE LEFT HEATER/EXHAUST MUFFLER, THE SOURCE OF HEAT TO THE CABIN, SHOWED IT HAD DETERIORATED AND HAD THREE CRACKS. TWO CRACKS WHERE FOUND ON THE MUFFLER TUBE AND ONE ON THE FORWARD END PLATE. THE THREE CRACKS WERE INTERGRANULAR AND SHOWED SOME OXIDATION.
Flight
Event TypeAccident
Event Time17:53 EST
Nearest Airport0nm N
Runway0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna 150H
Tail NumberN6402S
Aircraft CategoryAir
DamageSubstantial
OperatorGeorge Wharton
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · O-200A · Reciprocating · 100
Seats2
People & Injuries
Injury Summary1 injury (1 serious injury)
Fatal0
Serious1
Minor0
Uninjured0
Total1
Crew 1Age 45 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 7 kt
CeilingNone
Temperature / Dew Point52 / 36 C
Altimeter0
Weather SourceWIT