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Accident
Last updated: 21 October 2017
Status:Schlussbericht
Datum:Dienstag 12 März 1985
Zeit:00:15
Flugzeugtyp:Silhouette image of generic DHC6 model; specific model in this crash may look slightly different
de Havilland Canada DHC-6 Twin Otter 300
Fluggesellschaft:Seair Alaska Airlines
Kennzeichen: N540N
Werknummer: 401
Baujahr: 1973
Betriebsstunden:13652
Triebwerk: 2 Pratt & Whitney Canada PT6A-27
Besatzung:Todesopfer: 0 / Insassen: 2
Fluggäste:Todesopfer: 0 / Insassen: 2
Gesamt:Todesopfer: 0 / Insassen: 4
Sachschaden: schwer beschädigt
Konsequenzen: Written off (damaged beyond repair)
Unfallort:Barter Island, AK (   USA)
Flugphase: Annäherung (APR)
Betriebsart:Inländischer außerplanmäßiger Passagierflug
Flug von:Prudhoe Bay Airport, AK (PUO), USA
Flug nach:Barter Island Airport, AK (BTI/PABA), USA
Unfallbericht:
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:

PROBABLE CAUSE:
"Flight manuals..not followed..pilot in command
Weather condition..icing conditions
Altitude..inadequate..pilot in command
CONTRIBUTING FACTORS
Terrain condition..snow covered
Overconfidence in aircraft's ability..pilot in command
Inadequate surveillance of operation..company/operator management
Weather condition..fog
Weather evaluation..inaccurate..pilot in command
Company-induced pressure..company/operator 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/operator..company/operator 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
Wing..ice
Anti-ice/deice system..not used..pilot in command"

Informationsquelle:
» NTSB id ANC85FA054


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Prudhoe Bay Airport, AK to Barter Island Airport, AK as the crow flies is 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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