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Statuts:Enquête Officielle
Date:vendredi 22 mai 1953
Type/Sous-type:Silhouette image of generic C46 model; specific model in this crash may look slightly different
Curtiss C-46F-1-CU Commando
Opérant pour:Resort Airlines
Loué à :United States Air Force - USAF
Immatriculation: N1669M
Numéro de série: 22536
Année de Fabrication: 1945
Heures de vol:6867
Moteurs: 2 Pratt & Whitney R-2800-75
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 0 / à bord: 0
Total:victimes: 2 / à bord: 2
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:18 km (11.3 milles) NE of Des Moines, IA (   Etats-Unis d'Amérique)
Phase de vol: En vol (ENR)
Aéroport de départ:Cheyenne Airport, WY (CYS/KCYS), Etats-Unis d'Amérique
Aéroport de destination:Chicago-O'Hare International Airport, IL (ORD/KORD), Etats-Unis d'Amérique
The aircraft arrived at Cheyenne, Wyoming at 00:38 on a Civil Air Movement flight from New York International Airport. The aircraft departed Cheyenne at 01:32, on an instrument flight plan to Chicago at 7,000 feet. The C-46 progressed uneventfully until it reached Omaha. The pilot contacted Omaha INSAC and requested a change of altitude to 3,000 feet. This was denied because another flight proceeded at 2,600 feet between Des Moines and Omaha. The aircraft flew then into a severe thunderstorm in the vicinity of Des Moines. The aircraft lost control and subsequently the right wing panel failed at the attach angles to the center section due to a strong downward force which exceeded the design strength of the wing. The wing panel then struck the tail, causing it to disintegrate.

Probable Cause:

PROBABLE CAUSE: "Separation of the right aileron tab motor from its support bracket due to loss of its outboard trunnion while the aircraft was in the severe turbulence of a thunderstorm. These conditions resulted in a tendency to roll erratically, and in conjunction with the extreme turbulence, caused loss of control and subsequent overloading of the wing to the point of failure."

» CAB File No. 1-0034
» ICAO Accident Digest Circular 39-AN/34 (80-83)


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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 Cheyenne Airport, WY et Chicago-O'Hare International Airport, IL est de 1398 km (873 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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