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Last updated: 21 May 2019
Statuts:Enquête Officielle
Date:lundi 12 février 1979
Heure:13:00
Type/Sous-type:Silhouette image of generic N262 model; specific model in this crash may look slightly different
Mohawk 298 (Nord 262)
Compagnie:Allegheny Airlines
Immatriculation: N29824
Numéro de série: 48
Année de Fabrication: 1968
Heures de vol:9140
Moteurs: 2 Pratt & Whitney Canada PT6A-45
Equipage:victimes: 1 / à bord: 3
Passagers:victimes: 1 / à bord: 22
Total:victimes: 2 / à bord: 25
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Clarksburg-Benedum Airport, WV (CKB) (   Etats-Unis d'Amérique)
Phase de vol: En montée initiale (ICL)
Nature:Transport de Passagers Nat.
Aéroport de départ:Clarksburg-Benedum Airport, WV (CKB/KCKB), Etats-Unis d'Amérique
Aéroport de destination:Washington-National Airport, DC (DCA/KDCA), Etats-Unis d'Amérique
Numéro de vol: 561
Détails:
At 11:16 Allegheny Flight 561 departed Clarksburg for a flight to Morgantown, WV but the pilot decided not to make an approach at Morgantown because the ILS glide slope was out of service, and the visibility was 1/2 mile. The flight returned to Clarksburg and landed at 11:46.
The aircraft was refueled and prepared for a rescheduled flight 561 to Washington-National Airport. The Nord 262 was de-iced between 12:20 and 12:35. When the crew taxied out at about 12:57 there was again some wet snow on all its horizontal surfaces.
Shortly after lift-off from runway 21 the aircraft rolled 45deg to the right, 45deg to the left and back to the right again until the wing struck the ground. The aircraft crashed and came to rest inverted.

Probable Cause:

PROBABLE CAUSE: "The captain's decision to take off with snow on the aircraft's wing and empennage surfaces which resulted in a loss of lateral control and a loss of lift as the aircraft ascended out of ground effect."

Accident investigation:
cover
Investigating agency: NTSB
Status: Investigation completed
Duration: 185 days (6 months)
Accident number: NTSB/AAR-79-12
Download report: Final report

Sources:
» NTSB Safety Recommendations A-80-112/114
» NTSB-AAR-79-12


Photos

photo of Mohawk-298-F-BSTN
accident date: 12-02-1979
type: Mohawk 298
registration: F-BSTN
 

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 Clarksburg-Benedum Airport, WV et Washington-National Airport, DC est de 278 km (174 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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