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Accident
Last updated: 13 December 2017
Statuts:Enquête Officielle
Date:vendredi 4 janvier 2002
Heure:12:07
Type/Sous-type:Silhouette image of generic CL60 model; specific model in this crash may look slightly different
Canadair CL-600-2B16 Challenger 604
Compagnie:Epps Air Service
Immatriculation: N90AG
Numéro de série: 5414
Année de Fabrication: 1999
Heures de vol:1594
Cycles:797
Moteurs: 2 General Electric CF34-3B
Equipage:victimes: 2 / à bord: 2
Passagers:victimes: 3 / à bord: 3
Total:victimes: 5 / à bord: 5
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Birmingham International Airport (BHX) (   Royaume Uni)
Phase de vol: Au décollage (TOF)
Nature:Affaires
Aéroport de départ:Birmingham International Airport (BHX/EGBB), Royaume Uni
Aéroport de destination:Bangor International Airport, ME (BGR/KBGR), Etats-Unis d'Amérique
Détails:
Challenger N90AG was prepared for a flight from Birmingham, UK to Bangor. The flight was cleared to taxi at 12:01 hrs. The captain was pilot-non-flying and was seated in the right cockpit seat. During taxi, the crew completed their normal Before Takeoff Checks; these included confirmation that the control checks had been completed and that anti-ice might be required immediately after takeoff. Flap 20 had been selected for takeoff and the following speeds had been calculated and briefed by the pilots: V1 137 kt; VR 140 kt; V2 147 kt. By 12:06, the aircraft was cleared to line up on runway 15. At 12:07 hrs, N90AG was cleared for takeoff with a surface wind of 140°/8 kt. Takeoff appeared normal up to lift-off. Rotation was started at about 146 kt. Lift-off occurred 2 seconds later, at about 153 kt and with a pitch attitude of about 8 degrees nose-up. Immediately after lift-off, the aircraft started to bank to the left. The rate of bank increased rapidly and 2 seconds after lift-off the bank angle had reached 50 degrees. At that point, the aircraft heading had diverged about 10 degrees to the left. Opposite aileron, followed closely by right rudder, was applied as the aircraft started banking; full right aileron and full right rudder had been applied within 1 second and were maintained. As the bank angle continued to increase, progressively more aircraft nose-up elevator was applied. Stick-shaker operation initiated 3.5 seconds after lift-off. The left winglet contacted the runway shoulder, the outboard part of the left wing detached and the aircraft struck the ground inverted, structurally separating the forward fuselage. Fuel released from ruptured tanks ignited and the wreckage slid to a halt on fire. The last recorded aircraft attitude was approximately 111 degrees left bank and 13 degrees nose-down pitch.

Probable Cause:

CAUSAL FACTORS: "1. The crew did not ensure that N90AG's wings were clear of frost prior to takeoff.; 2. Reduction of the wing stall angle of attack, due to the surface roughness associated with frost contamination, to below that at which the stall protection system was effective.; 3. Possible impairment of crew performance by the combined effects of a non-prescription drug, jet-lag and fatigue."

Accident investigation:
cover
Investigating agency: AAIB
Status: Investigation completed
Duration: 2 years and 6 months
Accident number: AAIB AAR 5-2004
Download report: Final report

Sources:
» SKYbrary 


Opérations de secours

AAIB issued 5 Safety Recommendations

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Photos

photo of Canadair CL-600-2B16 Challenger 604 N90AG
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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 Birmingham International Airport et Bangor International Airport, ME est de 4785 km (2991 miles).
Accident location: Exact; deduced from official accident report.

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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