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NTSB Report
December 21, 2011 · Cessna 207A · N6480H
Kwigillingok, AK
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
December 21, 2011
Injury Outcomes
1 injury (1 minor injury)
Location
Kwigillingok, AK
Aircraft
Cessna 207A
Tail Number
N6480H
Operator
Flight Alaska
Injuries
Minor
Aircraft Damage
Substantial
NTSB Number
ANC12CA016
The pilot reported that he was flying in visual meteorological conditions for most of the flight. As he approached the airport, he inadvertently entered an area of instrument meteorological conditions that resulted in a buildup of ice on the airframe and windscreen. He attempted to make a 180-degree turn to exit the conditions but was unable to maintain sufficient airspeed for flight, and the airplane descended and collided with terrain. The impact resulted in substantial damage to the fuselage, empennage, and wings.
NTSB Probable Cause
The pilot’s decision to continue visual flight into instrument meteorological conditions with moderate icing, which resulted in structural icing and an aerodynamic stall.
Full Narrative
The pilot reported he was flying in visual meteorological conditions for most of the flight. As he approached the airport, he inadvertently entered an area of instrument meteorological conditions that resulted in a buildup of ice on the airframe and windscreen. He attempted to make a 180 degree turn to exit the conditions, but was unable to maintain sufficient airspeed for flight, and the airplane descended and collided with terrain. The impact resulted in substantial damage to the fuselage, empennage, and wings.
Flight
Event TypeAccident
Event Time05:20 AKST
Nearest AirportKwigillingok (0nm)
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft
AircraftCessna 207A
Tail NumberN6480H
Aircraft CategoryAir
DamageSubstantial
OperatorFlight Alaska
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsCont Motor · IO 520 SERIES · Reciprocating · 285
Seats7
People & Injuries
Injury Summary1 injury (1 minor injury)
Fatal0
Serious0
Minor1
Uninjured0
Total1
Crew 1Age 44 · Second Class · Minor
Conditions
ConditionsIMC
LightDaylight
WindCalm
Visibility1 sm
Ceiling500 ft
Temperature / Dew Point21 C / 19 C
Altimeter29.54 inHg
Observation Time13:08
Weather SourcePILO