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Last updated: 5 December 2020
Datum:dinsdag 12 maart 1985
Type:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Luchtvaartmaatschappij:Seair Alaska Airlines
Registratie: N540N
Constructienummer: 401
Bouwjaar: 1973
Aantal vlieguren:13652
Motoren: 2 Pratt & Whitney Canada PT6A-27
Bemanning:slachtoffers: 0 / inzittenden: 2
Passagiers:slachtoffers: 0 / inzittenden: 2
Totaal:slachtoffers: 0 / inzittenden: 4
Schade: Groot
Gevolgen: Written off (damaged beyond repair)
Plaats:Barter Island, AK (   Verenigde Staten)
Fase: Nadering (APR)
Soort vlucht:Binnenlandse charter
Vliegveld van vertrek:Prudhoe Bay Airport, AK (PUO), Verenigde Staten
Vliegveld van aankomst:Barter Island Airport, AK (BTI/PABA), Verenigde Staten
The aircraft had to carry out a missed approach to a temporary winter landing strip and crashed in a steep nose down attitude, about 900 m past the runway end due to ice accretion (3/16 inch) on the wings. The de-ice boots were not used.

Probable Cause:

"Flight manuals..not followed..pilot in command
Weather condition..icing conditions
Altitude..inadequate..pilot in command
Terrain condition..snow covered
Overconfidence in aircraft's ability..pilot in command
Inadequate surveillance of management
Weather condition..fog
Weather evaluation..inaccurate..pilot in command
Company-induced management
Inadequate surveillance of operation..FAA
Light condition..dark night
In-flight planning/decision..poor..pilot in command
Expectancy..other person
Insufficient standards/requirements,operation/ management
Light condition..dark night
Weather evaluation..inaccurate..pilot in command
Fatigue (flight and ground schedule)..pilot in command
Flight into known adverse weather..intentional..pilot in command
Anti-ice/deice system..not used..pilot in command"

» NTSB id ANC85FA054


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Deze kaart geeft het vliegveld van vetrek weer en de geplande bestemming van de vlucht. De lijn tussen de vliegvelden geeft niet de exacte vliegroute weer.
De afstand tussen Prudhoe Bay Airport, AK en Barter Island Airport, AK bedraagt 195 km (122 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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