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NTSB Report
March 28, 1990 · Piper PA-18-150 · N7134K
Whitewater, MT
Overview
Report Status
Probable Cause
Event Type
Accident
Date
March 28, 1990
Injury Outcomes
No injuries (1 uninjured)
Location
Whitewater, MT
Aircraft
Piper PA-18-150
Tail Number
N7134K
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN90LA082
THE PRIVATE PILOT ENCOUNTERED FREEZING FOG AND HAZE, REDUUCING THE VISIBILITY TO THREE MILES. HE TURNED BACK TO LAND BUT THE ENGINE BEGAN TO RUN ROUGH. HE ADDED CARBURETOR HEAT BUT THE ENGINE BECAME ROUGHER AND REDUCED TO PARTIAL POWER. THE PILOT SELECTED A RIDGE IN ROUGH TERRAIN AND MADE A FORCED LANDING. AT TOUCHDOWN, THE TAIL LIFTED AND THE PLANE NOSED OVER. THE VERTICAL STABILIZER, ELEVATOR, WINGS, COWLING AND FIREWALL WERE BENT. DURING A POSTACCIDENT ENGINE RUN THE ENGINE OPERATED NORMALLY AND RAN FOR FIVE MINUTES.
NTSB Probable Cause
PILOT'S DELAYED USE OF CARBURETOR HEAT AND THE SUBSEQUENT INDUCTION ICING RELATED PARTIAL POWER LOSS. CONTRIBUTING FACTORS WERE THE CARBURETOR ICING CONDITIONS AND THE UNSUITABLE TERRAIN IN WHICH THE FORCED LANDING WAS PERFORMED.
Full Narrative
THE PRIVATE PILOT ENCOUNTERED FREEZING FOG AND HAZE, REDUUCING THE VISIBILITY TO THREE MILES. HE TURNED BACK TO LAND BUT THE ENGINE BEGAN TO RUN ROUGH. HE ADDED CARBURETOR HEAT BUT THE ENGINE BECAME ROUGHER AND REDUCED TO PARTIAL POWER. THE PILOT SELECTED A RIDGE IN ROUGH TERRAIN AND MADE A FORCED LANDING. AT TOUCHDOWN, THE TAIL LIFTED AND THE PLANE NOSED OVER. THE VERTICAL STABILIZER, ELEVATOR, WINGS, COWLING AND FIREWALL WERE BENT. DURING A POSTACCIDENT ENGINE RUN THE ENGINE OPERATED NORMALLY AND RAN FOR FIVE MINUTES.
Flight
Event TypeAccident
Event Time07:20 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-18-150
Tail NumberN7134K
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-A2B · Reciprocating · 150
Seats2
People & Injuries
Injury SummaryNo injuries (1 uninjured)
Fatal0
Serious0
Minor0
Uninjured1
Total1
Crew 1Age 40 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility3 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO