Accident
Last updated: 1 October 2014
Statuts:Enquête Officielle
Date:vendredi 2 janvier 1998
Heure:15:26
Type/Sous-type:Silhouette image of generic DC6 model; specific model in this crash may look slightly different
Douglas DC-6B
Compagnie:Woods Air Fuel
Immatriculation: N861TA
Numéro de série: 43522/229
Année de Fabrication: 1952
Heures de vol:46626
Moteurs: 4 Pratt & Whitney R-2800-CB16
Equipage:victimes: 0 / à bord: 3
Passagers:victimes: 0 / à bord: 0
Total:victimes: 0 / à bord: 3
Dégats de l'appareil: Détruit
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Nixon Fork Mine, AK (   Etats-Unis d'Amérique)
Phase de vol: Au décollage (TOF)
Nature:Cargo
Aéroport de départ:Nixon Fork Mine, AK, Etats-Unis d'Amérique
Aéroport de destination:Palmer Municipal Airport, AK (PAQ), Etats-Unis d'Amérique
Détails:
At an indicated airspeed of 45 knots during the takeoff roll, ice formed between the inner and outer windshield panes, with the icing following the flow of heated air through the windshield. The crew's forward visibility was obscured, and the takeoff was aborted. The captain reported that the airplane drifted left into snow berms on the side of the 4200 feet long by 85 feet wide runway and caught fire.
The "DC-6 Airplane Operating Manual" used by two other companies states "...Certain combinations of temperature and humidity will cause moisture to condense from the air between the windshield panels and settle on the inner surfaces of the glass, obscuring vision. Once formed, anti-icing airflow with heater operation will be required to clear the panels." This language was not included in the Supplemental Type Certificate (STC) literature, nor in the flight handbook for the company operating the accident airplane.


PROBABLE CAUSE: "The ingestion of snow into the windshield anti-ice system, and the resulting obscured windshield which made runway alignment not possible. Factors associated with this accident were the cold windshield, the reduced performance of the windshield anti-ice because of the short taxi by the crew, and the insufficient information on the system provided by the manufacturer."

Sources:
» ICAO Adrep Summary 6/98 (#47)


Photos

photo of Douglas DC-6B N861TA
photo of Douglas DC-6B N861TA
N861TA two years prior to being sold to Woods Air Fuel
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Nixon Fork Mine, AK et Palmer Municipal Airport, AK est de 341 km (213 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tels qui sont connus à ce jour.
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