| Statuts: | Enquête Officielle |
| Date: | vendredi 12 mars 1948 |
| Heure: | 21:14 |
| Type/Sous-type: |  Douglas C-54G-1-DO (DC-4) |
| Compagnie: | Northwest Airlines |
| Immatriculation: | NC95422 |
| Numéro de série: | 35966 |
| Année de Fabrication: | 1945 |
| Heures de vol: | 3306 |
| Moteurs: | 4 Pratt & Whitney R-2000-13 |
| Equipage: | victimes: 6 / à bord: 6 |
| Passagers: | victimes: 24 / à bord: 24 |
| Total: | victimes: 30 / à bord: 30 |
| Dégats de l'appareil: | Perte Totale |
| Conséquences: | Written off (damaged beyond repair) |
| Lieu de l'accident: | Mount Sanford, AK ( Etats-Unis d'Amérique)
|
| Phase de vol: | En vol (ENR) |
| Nature: | Charter National |
| Aéroport de départ: | Anchorage-Merrill Field, AK (MRI/PAMR), Etats-Unis d'Amérique |
| New York-La Guardia Airport, NY (LGA/KLGA), Etats-Unis d'Amérique | |
| Numéro de vol: | 4422 |
Northwest flight 4422 was a non-scheduled charter flight en route from Shanghai-Lunghwa Airport to La Guardia Field. An intermediate stop was made at Anchorage. Takeoff from Anchorage was accomplished at 20:12 and the DC-4 climbed to the cruising altitude of 11,000 feet. The last position report was at 21:03 when the flight reported being over the Gulkana radio range station. At that point the airway deflects to the north, its course being 23 degrees, to provide a safe lateral distance from Mt. Sanford which has an elevation of 16,208 feet. The DC-4 continued off the airway and flew into Mount Sanford. The wreckage slid down for about 3000 feet before coming to rest. The wreckage was spotted the day after the accident, but it took until July 24, 1999 before someone was able to reach the crash site.
Probable Cause:
PROBABLE CAUSE: "The Board determines that the probable cause of this accident was the pilot's failure to see Mt. Sanford, which was probably obscured by clouds or the aurora borealis or both while flying a course off the airway."
Sources:
» CAB File No. 1-0025Photos
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 Anchorage-Merrill Field, AK et New York-La Guardia Airport, NY est de 5367 km (3355 miles).
Accident location: Approximate; accuracy within a few kilometers.
La distance entre Anchorage-Merrill Field, AK et New York-La Guardia Airport, NY est de 5367 km (3355 miles).
Accident location: Approximate; accuracy within a few kilometers.
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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Douglas DC-4
- 1242 built
- 89ème loss
- 46ème accident fatal
- le accident 10ème le plus grave (à ce moment là)
- le accident 45ème le plus grave (en ce moment)
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