Date: | Tuesday 12 March 1985 |
Time: | 00:15 |
Type: | de Havilland Canada DHC-6 Twin Otter 300 |
Owner/operator: | Seair Alaska Airlines |
Registration: | N540N |
MSN: | 401 |
Year of manufacture: | 1973 |
Total airframe hrs: | 13652 hours |
Engine model: | Pratt & Whitney Canada PT6A-27 |
Fatalities: | Fatalities: 0 / Occupants: 4 |
Aircraft damage: | Substantial, written off |
Category: | Accident |
Location: | Barter Island, AK -
United States of America
|
Phase: | Approach |
Nature: | Passenger - Non-Scheduled/charter/Air Taxi |
Departure airport: | Prudhoe Bay Airport, AK (PUO) |
Destination airport: | Barter Island Airport, AK (BTI/PABA) |
Confidence Rating: | Accident investigation report completed and information captured |
Narrative: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
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"
Sources:
NTSB id ANC85FA054
Revision history:
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