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NTSB Report
May 14, 1990 · Artic Aircraft Interstate S1B1 Interstate · N73AR
Talkeetna, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
May 14, 1990
Injury Outcomes
No injuries (2 uninjured)
Location
Talkeetna, AK
Aircraft
Artic Aircraft Interstate S1B1 Interstate
Tail Number
N73AR
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC90LA068
THE PILOT-IN-COMMAND ADDED FULL POWER AND ATTEMPTED TO CLIMB OVER A RIDGE WHEN THE ENGINE BEGAN TO SPUTTER. HE WAS FORCED TO LAND ON UNIMPROVED TERRAIN. EXAMINATION OF THE FUEL IN THE AIRPLANE REVEALED BROWN FLAKES WHICH WERE EXAMINED AND FOUND TO BE FLAKES OF GASOLINE VARNISH. THE PILOT STATED THE AIRPLANE HAD SAT WITHOUT OPERATING FOR A LONG TIME PRIOR TO HIS PURCHASE OF THE AIRPLANE.
NTSB Probable Cause
FUEL CONTAMINATION WHICH PRECLUDED THE ENGINE FROM DEVELOPING THE NECESSARY POWER TO CLEAR THE MOUNTAIN RIDGE.
Full Narrative
THE PILOT-IN-COMMAND ADDED FULL POWER AND ATTEMPTED TO CLIMB OVER A RIDGE WHEN THE ENGINE BEGAN TO SPUTTER. HE WAS FORCED TO LAND ON UNIMPROVED TERRAIN. EXAMINATION OF THE FUEL IN THE AIRPLANE REVEALED BROWN FLAKES WHICH WERE EXAMINED AND FOUND TO BE FLAKES OF GASOLINE VARNISH. THE PILOT STATED THE AIRPLANE HAD SAT WITHOUT OPERATING FOR A LONG TIME PRIOR TO HIS PURCHASE OF THE AIRPLANE.
Flight
Event TypeAccident
Event Time19:00 AKDT
Nearest Airport0nm
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftArtic Aircraft Interstate S1B1 Interstate
Tail NumberN73AR
Aircraft CategoryAir
DamageSubstantial
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320-B2B · Reciprocating · 160
Seats2
People & Injuries
Injury SummaryNo injuries (2 uninjured)
Fatal0
Serious0
Minor0
Uninjured2
Total2
Crew 1Age 38 · Third Class
Conditions
ConditionsVMC
LightDaylight
Wind170° @ 4 kt
Visibility30 sm
CeilingBroken clouds 20000 ft
Temperature / Dew Point50 / 36 C
Altimeter30.00 inHg
Observation Time14:00
Weather SourcePILO