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NTSB Report
July 8, 1989 · Piper PA-20 · N7029K
Eureka, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 8, 1989
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Eureka, AK
Aircraft
Piper PA-20
Tail Number
N7029K
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
ANC89LA118
THE PILOT WAS USING AUTOMOTIVE FUEL IN HIS AIRPLANE & HAD MADE NUMEROUS TAKEOFFS & LANDINGS IN RAPID SUCCESSION. THE TEMPERATURE WAS 50 DEGREES, THE SKY WAS CLEAR & THE AIRSTRIP ELEVATION WAS ABOUT 4000 FT. JUST AFTER LIFT-OFF, THE ENGINE COUGHED ONCE, THEN STOPPED COMPLETELY AS IF SOMEONE HAD TURNED IT OFF. SUBSQUENTLY THE AIRPLANE WAS DAMAGED DURING A LANDING ON UNEVEN TUNDRA. NO MECHANICAL IRREGULARITTIES WERE FOUND WITH THE ENGINE OR AIRPLANE. THE CARBURETOR COMPOSITE FLOAT WAS WEIGHTED & FOUND TO BE WITHIN SPECIFIED LIMITS, BUT WHEN SECTIONED, IT GAVE OFF A SLIGHT HYDROCARBONODOR. VAPOR PRESSURE OF THE AUTO FUEL WAS RPRTD TO BE 15 PSI AS COMPARED TO 5 PSI FOR 100 OCTANE AVIATION FUEL (AUTO FUEL MORE SUSCEPTIBLE TO VAPOR LOCK).
NTSB Probable Cause
LOSS OF ENGINE POWER FOR AN UNKNOWN REASON. A FACTOR RELATED TO THE ACCIDENT WAS: ROUGH TERRAIN IN THE EMERGENCY LANDING AREA.
Full Narrative
THE PILOT WAS USING AUTOMOTIVE FUEL IN HIS AIRPLANE & HAD MADE NUMEROUS TAKEOFFS & LANDINGS IN RAPID SUCCESSION. THE TEMPERATURE WAS 50 DEGREES, THE SKY WAS CLEAR & THE AIRSTRIP ELEVATION WAS ABOUT 4000 FT. JUST AFTER LIFT-OFF, THE ENGINE COUGHED ONCE, THEN STOPPED COMPLETELY AS IF SOMEONE HAD TURNED IT OFF. SUBSQUENTLY THE AIRPLANE WAS DAMAGED DURING A LANDING ON UNEVEN TUNDRA. NO MECHANICAL IRREGULARITTIES WERE FOUND WITH THE ENGINE OR AIRPLANE. THE CARBURETOR COMPOSITE FLOAT WAS WEIGHTED & FOUND TO BE WITHIN SPECIFIED LIMITS, BUT WHEN SECTIONED, IT GAVE OFF A SLIGHT HYDROCARBONODOR. VAPOR PRESSURE OF THE AUTO FUEL WAS RPRTD TO BE 15 PSI AS COMPARED TO 5 PSI FOR 100 OCTANE AVIATION FUEL (AUTO FUEL MORE SUSCEPTIBLE TO VAPOR LOCK).
Flight
Event TypeAccident
Event Time23:00 AKDT
Nearest AirportDirt Strip (0nm N)
Runway0
Runway Length1500 ft
Runway Width15 ft
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-20
Tail NumberN7029K
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-290-D-135 · Reciprocating · 135
Seats2
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 24 · Third Class
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility90 sm
CeilingNone
Temperature / Dew Point50 / 0 C
Altimeter0
Weather SourcePILO