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NTSB Report
September 12, 1991 · Piper PA-18-150 · N2515A
Anaktuvuk Pass, AK
Overview
Report Status
Probable Cause
Event Type
Accident
Date
September 12, 1991
Injury Outcomes
2 injuries (1 serious injury, 1 minor injury)
Location
Anaktuvuk Pass, AK
Aircraft
Piper PA-18-150
Tail Number
N2515A
Operator
Holt Robert N
Injuries
Serious
Aircraft Damage
Substantial
NTSB Number
ANC91LA152
THE PILOT AND WITNESSES REPORTED THAT JUST AFTER THE AIRPLANE TOOK OFF FROM A REMOTE MOUNTAIN STRIP, THE LEFT WING SUDDENLY DROPPED, AND THE AIRPLANE SPUN TO THE GROUND. THE PILOT THOUGHT THAT HE HAD POSSIBLY NOT REMOVED ALL OF THE FROST FROM THE WINGS AFTER HE REMOVED THE WING COVERS. THE AIRPLANE HAD BEEN OUTSIDE OVERNIGHT. THE TEMPERATURES HAD BEEN BELOW FREEZING, AND 2-3 INCHES OF DRY SNOW HAD FALLEN.
NTSB Probable Cause
THAT THE PILOT INADVERTENTLY STALL/SPUN THE AIRPLANE TO THE GROUND. CONTRIBUTING TO THE ACCIDENT WAS THE PILOT'S FAILURE TO ADEQUATELY REMOVE THE ICE/FROST FROM THE WINGS BEFORE STARTING THE TAKEOFF.
Full Narrative
THE PILOT AND WITNESSES REPORTED THAT JUST AFTER THE AIRPLANE TOOK OFF FROM A REMOTE MOUNTAIN STRIP, THE LEFT WING SUDDENLY DROPPED, AND THE AIRPLANE SPUN TO THE GROUND. THE PILOT THOUGHT THAT HE HAD POSSIBLY NOT REMOVED ALL OF THE FROST FROM THE WINGS AFTER HE REMOVED THE WING COVERS. THE AIRPLANE HAD BEEN OUTSIDE OVERNIGHT. THE TEMPERATURES HAD BEEN BELOW FREEZING, AND 2-3 INCHES OF DRY SNOW HAD FALLEN.
Flight
Event TypeAccident
Event Time11:00 AKDT
Nearest Airport0nm
Runway0
Flight Plan FiledCvfr
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftPiper PA-18-150
Tail NumberN2515A
Aircraft CategoryAir
DamageSubstantial
OperatorHolt Robert N
Operating RulePart 91
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · O-320 · Reciprocating · 150
Seats2
People & Injuries
Injury Summary2 injuries (1 serious injury, 1 minor injury)
Fatal0
Serious1
Minor1
Uninjured0
Total2
Crew 1Age 33 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind360° @ 5 kt
Visibility5 sm
CeilingBroken clouds 2000 ft
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourcePILO