ASN logo
Accident
Last updated: 20 October 2017
Statuts:Enquête Officielle
Date:vendredi 23 juin 1950
Heure:23:25
Type/Sous-type:Silhouette image of generic DC4 model; specific model in this crash may look slightly different
Douglas DC-4
Compagnie:Northwest Orient Airlines
Immatriculation: N95425
Numéro de série: 10270
Année de Fabrication: 1943
Heures de vol:15902
Moteurs: 4 Pratt & Whitney R-2000-2SD13G Twin Wasp
Equipage:victimes: 3 / à bord: 3
Passagers:victimes: 55 / à bord: 55
Total:victimes: 58 / à bord: 58
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:29 km (18.1 milles) NNW de Benton Harbour, MI [Lake Michigan] (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:New York-La Guardia Airport, NY (LGA/KLGA), Etats-Unis d'Amérique
Aéroport de destination:Minneapolis-St. Paul International Airport, MN (MSP/KMSP), Etats-Unis d'Amérique
Numéro de vol:2501
Détails:
Northwest flight 2501, was scheduled to operate between New York and Seattle via Minneapolis and Spokane.
At approximately 19:31 the flight departed from LaGuardia Airport. At 21:49, when over Cleveland a cruising altitude of 4,000 feet was requested by the flight and approved by ARTC. Forty minutes later the flight was requested by ARTC to descend to 3,500 feet because there was an eastbound flight at 5,000 feet over Lake Michigan which was experiencing severe turbulence and difficulty in maintaining its assigned altitude. ARTC estimated that the standard separation of 1,000 feet would not be sufficient because of the turbulence. At 22:51, Flight 2501 reported that it was over Battle Creek at 3,500 feet, and that it would be over Milwaukee at 23:37. When in the vicinity of Benton Harbor, at 23:13, the flight requested a cruising altitude of 2,500 feet, however, no reason was given for the request. Acknowledgement that ARTC could not approve descent to 2,500 feet was received at 23:15, and this was the last communication received from the flight. An intensive search of the Lake Michigan area was commenced at daylight June 24. On the following day, at 18:30, a United States Coast Guard cutter found an oil slick, and aircraft debris in Lake Michigan approximately 18 miles north-northwest of Benton Harbor. At the time the aircraft crashed, it was flying through an area of considerable thunderstorm activity. The crew knew about the thunderstorm activity and the possible development of a squall line forecast of a squall line, but had not been given a forecast describing the development and location of a squall line that had been issued 100 minutes before the accident.

Probable Cause:

PROBABLE CAUSE: "Insufficient evidence upon which to make a determination of probable cause."

Sources:
» CAB File No. 1-0081


Photos

photo of Douglas DC-4 N95425
Northwest Flight 2501 crash memorial
Add your photo of this accident or aircraft
 

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 New York-La Guardia Airport, NY et Minneapolis-St. Paul International Airport, MN est de 1626 km (1017 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.
languages: languages

Share

Douglas DC-4

  • 1242+ built
  • 126ème loss
  • 63ème accident fatal
  • le accident The le plus grave (à ce moment là)
  • le accident 10ème le plus grave (en ce moment)
» safety profile

 Etats-Unis d'Amérique
  • le accident The le plus grave (à ce moment là)
  • le accident 48ème le plus grave (en ce moment)
» safety profile