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NTSB Report
July 31, 1992 · Rockwell 112TC · N4581W
Glendale, AZ
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 31, 1992
Injury Outcomes
No injuries (1 uninjured)
Location
Glendale, AZ
Aircraft
Rockwell 112TC
Tail Number
N4581W
Operator
Kevin D Nielsen
Injuries
None
Aircraft Damage
Substantial
NTSB Number
LAX92LA327
THE ACCIDENT SEQUENCE WAS WITNESSED BY SEVERAL A & P MECHANICS WORKING AT THE GLENDALE AIRPORT. ONE WITNESS SAID THE ENGINE SEEMED TO BE RUNNING ROUGH AND BACKFIRING DURING THE PRETAKEOFF ENGINE RUNUP. THE AIRCRAFT INITIATED A TAKEOFF AND THE WITNESSES REPORTED THAT THE ENGINE ROUGHNESS AND BACKFIRING CONTINUED THROUGHOUT THE TAKEOFF GROUND ROLL AND INITIAL CLIMB. THE AIRCRAFT WAS OBSERVED TO MANEUVER TO THE DOWN WIND LEG AS IF THE PILOT WERE ATTEMPTING TO RETURN FOR A LANDING, THEN THE ENGINE CEASED RUNNING ALTOGETHER. THE AIRCRAFT COLLIDED WITH THE GROUND IN A CORN FIELD ABOUT ONE HALF MILE FROM THE END OF THE RUNWAY AND SHEARED OFF THE LANDING GEAR. EXAMINATION OF THE ENGINE BY AN A & P MECHANIC UNDER THE SUPERVISION OF FAA INSPECTORS REVEALED THAT THE NUMBER ONE CYLINDER EXHAUST VALVE WAS STUCK IN THE OPEN POSITION DUE TO CARBON BUILDUP ON THE VALVE STEM.
NTSB Probable Cause
A LOSS OF ENGINE POWER DUE TO EXCESSIVE CARBON DEPOSITS ON THE NUMBER ONE CYLINDER EXHAUST VALVE, AND, THE PILOTS ATTEMPTED OPERATION OF THE AIRCRAFT WITH KNOWN MECHANICAL DEFICIENCIES.
Full Narrative
THE ACCIDENT SEQUENCE WAS WITNESSED BY SEVERAL A & P MECHANICS WORKING AT THE GLENDALE AIRPORT. ONE WITNESS SAID THE ENGINE SEEMED TO BE RUNNING ROUGH AND BACKFIRING DURING THE PRETAKEOFF ENGINE RUNUP. THE AIRCRAFT INITIATED A TAKEOFF AND THE WITNESSES REPORTED THAT THE ENGINE ROUGHNESS AND BACKFIRING CONTINUED THROUGHOUT THE TAKEOFF GROUND ROLL AND INITIAL CLIMB. THE AIRCRAFT WAS OBSERVED TO MANEUVER TO THE DOWN WIND LEG AS IF THE PILOT WERE ATTEMPTING TO RETURN FOR A LANDING, THEN THE ENGINE CEASED RUNNING ALTOGETHER. THE AIRCRAFT COLLIDED WITH THE GROUND IN A CORN FIELD ABOUT ONE HALF MILE FROM THE END OF THE RUNWAY AND SHEARED OFF THE LANDING GEAR. EXAMINATION OF THE ENGINE BY AN A & P MECHANIC UNDER THE SUPERVISION OF FAA INSPECTORS REVEALED THAT THE NUMBER ONE CYLINDER EXHAUST VALVE WAS STUCK IN THE OPEN POSITION DUE TO CARBON BUILDUP ON THE VALVE STEM.
Flight
Event TypeAccident
Event Time15:05 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftRockwell 112TC
Tail NumberN4581W
Aircraft CategoryAir
DamageSubstantial
OperatorKevin D Nielsen
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · TO-360 · Reciprocating · 200
Seats4
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 38 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility30 sm
CeilingNone
Temperature / Dew Point10 C / 0 C
Altimeter29.00 inHg
Weather SourcePILO