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NTSB Report
July 12, 1990 · Cessna P210R · N6203A
Ogden, UT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 12, 1990
Injury Outcomes
2 injuries (1 fatality, 1 serious injury)
Location
Ogden, UT
Aircraft
Cessna P210R
Tail Number
N6203A
Operator
Great Western Aviation
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
DEN90FA159
THE TWO PLTS HAD DEPARTED ON A FLT TO GET TWO REVENUE PASSENGERS. THE LEFT SEAT PLT WAS AT THE CTLS WHEN A LOSS OF ENG POWER OCCURRED. HE MADE A 180 DEG TURN & WAS GLIDING DOWN A CANYON WHEN IT STRUCK AN UNMARKED POWER LINE AT THE MOUTH OF THE CANYON. IMPACT OCCURRED ABOUT 100 TO 200 FT AGL. A POST-ACDNT EXAM OF THE ENG REVEALED EVIDENCE OF DETONATION/PREIGNITION & EXCESSIVE HEATING IN THE #1 CLYINDER & SUBSEQUENT FAILURE OF THE #1 PISTON.
NTSB Probable Cause
FAILURE OF THE #1 PISTON DUE TO PRE-IGNITION/DETONATION IN THE #1 CYLINDER, AND INADEQUATE VISUAL LOOKOUT BY THE PILOT (HIS FAILURE TO SEE-AND-AVOID THE OBSTRUCTION). THE OBSTRUCTION (POWER LINE) WAS A RELATED FACTOR.
Full Narrative
THE TWO PLTS HAD DEPARTED ON A FLT TO GET TWO REVENUE PASSENGERS. THE LEFT SEAT PLT WAS AT THE CTLS WHEN A LOSS OF ENG POWER OCCURRED. HE MADE A 180 DEG TURN & WAS GLIDING DOWN A CANYON WHEN IT STRUCK AN UNMARKED POWER LINE AT THE MOUTH OF THE CANYON. IMPACT OCCURRED ABOUT 100 TO 200 FT AGL. A POST-ACDNT EXAM OF THE ENG REVEALED EVIDENCE OF DETONATION/PREIGNITION & EXCESSIVE HEATING IN THE #1 CLYINDER & SUBSEQUENT FAILURE OF THE #1 PISTON.
Flight
Event TypeAccident
Event Time07:18 MDT
Nearest AirportOGDEN (0nm N)
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftCessna P210R
Tail NumberN6203A
Aircraft CategoryAir
DamageDestroyed
OperatorGreat Western Aviation
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsContinental · TSIO-520-CE · Reciprocating · 325
Seats6
People & Injuries
Injury Summary2 injuries (1 fatality, 1 serious injury)
Fatal1
Serious1
Minor0
Uninjured0
Total2
Crew 1Age 52 · First Class
Conditions
ConditionsVMC
LightDaylight
Wind150° @ 7 kt
Visibility40 sm
CeilingNone
Temperature / Dew Point43 C
Altimeter30.00 inHg
Weather SourceWFAC