Accident
Last updated: 29 July 2014
Statuts:Enquête Officielle
Date:jeudi 19 novembre 2009
Heure:15:14
Type/Sous-type:de Havilland Canada DHC-8-202Q
Opérant pour:United States Air Force - USAF
Loué à :Win Win Aviation
Immatriculation: N355PH
Numéro de série: 500
Année de Fabrication: 1997-10-28 (12 years )
Moteurs: 2 Pratt & Whitney Canada PW123D
Equipage:victimes: 0 / à bord: 3
Passagers:victimes: 0 / à bord: 6
Total:victimes: 0 / à bord: 9
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:près de Tarakigné, 30 km from Kolokani (   Mali) show on map
Phase de vol: En vol (ENR)
Nature:Militaire
Aéroport de départ:Nouakchott Airport (NKC/GQNN), Mauritanie
Aéroport de destination:Bamako Airport (BKO/GABS), Mali
Détails:
A de Havilland Canada DHC-8-202Q turboprop airplane, registered N355PH, sustained substantial damage in a forced landing 30 km from Kolokani, Mali. All nine persons on board survived.
The airplane was assigned to the 524th Special Operations Squadron, 27th Special Operations Wing, U.S. Air Force Special Operations Command. It was used to conduct a passenger and cargo transportation sortie in support of United States Africa Command from Nouakchott Airport (NKC), Mauritania to Bamako Airport (BKO).
The crew had diplomatic clearance to on-load 4000 liters of fuel. Although two fuel trucks arrived, the pilots determined fuel was not necessary and the captain decided not to refuel.
The airplane departed at 12:29. At 13:41, 280 miles prior to Bamako, the crew began a descent out of FL250. At 14:35, 105 miles prior to Bamako, the crew leveled off at 6,000 ft. At 14:52, the crew diverted northeast to Kolokani, an airstrip 12 miles closer than Bamako. At 15:09, the #2 (right) engine shut down due to fuel exhaustion. At 15:14Z, 29 seconds prior to impact, the #1 (left) engine began to shut down due to fuel exhaustion. An forced landing was carried out. The right hand wing separated and the undercarriage collapsed. The airplane was a total loss with a cost estimate of $7,000,000.


The Accident Investigation Board (AIB) President found by clear and convincing evidence that the cause of this mishap was the mishap aircraft running out of fuel due to the mishap aircraft commander’s and mishap copilot’s failure to properly fuel plan and then refuel the mishap aircraft at Nouakchott with a sufficient amount to reach their destination. Once airborne, despite indications of a fuel shortage, the mishap crew did not divert to a suitable alternate airport early enough in the sortie to avoid this mishap. The AIB President also found sufficient evidence to conclude the following factors substantially contributed to the mishap: insufficient mission and flight planning; faulty decision-making; complacency; task misprioritization; channelized attention; and the mishap crew pressing to meet mission demands.

Sources:
» US AFRICOM statement
» USAF Accident Investigation Board (AIB) Executive Summary


Photos

photo of de Havilland Canada DHC-8-202Q N355PH
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Plan
Ce plan montre l'aéroport de départ ainsi que la supposé destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Nouakchott Airport et Bamako Airport est de 1051 km (657 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 tels qui sont connus à ce jour.
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