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Accident
Last updated: 15 December 2017
Statuts:Enquête Officielle
Date:jeudi 17 octobre 1946
Heure:00:57
Type/Sous-type:Silhouette image of generic DC3 model; specific model in this crash may look slightly different
Douglas C-47A-20-DK (DC-3)
Compagnie:National Air Transport Service
Immatriculation: NC38942
Numéro de série: 12971
Année de Fabrication: 1944
Heures de vol:1861
Moteurs: 2 Pratt & Whitney R-1830-92
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 10 / à bord: 10
Total:victimes: 13 / à bord: 13
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Laramie, WY (   Etats-Unis d'Amérique)
Phase de vol: En approche (APR)
Nature:Charter National
Aéroport de départ:Oakland Municipal Airport, CA (OAK/KOAK), Etats-Unis d'Amérique
Aéroport de destination:Cheyenne Airport, WY (CYS/KCYS), Etats-Unis d'Amérique
Détails:
NATS C-47 registered NC38942 departed Oakland Municipal Airport at 18:42 for a flight to Newark via Cheyenne. Oakland Airway Traffic Control Center authorized instrument flight via Airway Green 3 at an altitude of 11,000 feet to Salt Lake City and 13,000 feet to Cheyenne. At 21:54 Salt Lake ATC instructed the crew to cruise to Cheyenne Airport at 15,000 feet. At that time the weather at Cheyenne was being reported as: ceiling 100 feet, visibility 1/4 mile. By 22:30 the weather at Cheyenne had worsened to a reported zero ceiling and zero visibility. Prior to reaching Laramie the aircraft was cleared from 15,000 feet to 14,000 feet and at 00:05 the flight reported over Laramie. Weather at Laramie was reported ceiling indefinite, 400 feet overcast; visibility 20 miles; light rain. The captain decided to divert to Laramie and he was cleared for an instrument approach. At 00:40 the crew reported outbound on the northwest approach leg preparing for the final instrument approach. By that time visibility had dropped to 2 miles in light snow. Five minutes later the plane passed over the airport at a low altitude. A couple of minutes later the airplane's left wing tip struck the ground while the aircraft was in a left bank of at least 70 degrees, and while dragging along the ground for a distance of approximately 75 feet, the aircraft crashed and disintegrated.

Probable Cause:

PROBABLE CAUSE: "The action of the pilot in maneuvering the aircraft at a dangerously low altitude under extremely adverse weather conditions in an attempt to land. A contributing factor was the negligence of the pilot in planning a flight into an area in which adverse weather conditions were forecast without making adequate provisions for a suitable alternate airport."

Sources:
» CAB File No. 6966-46


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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Oakland Municipal Airport, CA et Cheyenne Airport, WY est de 1530 km (956 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 tel qu'ils sont connus à ce jour.
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