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Statuts:Enquête Officielle
Date:samedi 14 juillet 2001
Heure:08:53
Type/Sous-type:Silhouette image of generic IL76 model; specific model in this crash may look slightly different
Iliouchine Il-76TD
Compagnie:Russ Air Transport Company
Immatriculation: RA-76588
Numéro de série: 0043451530
Année de Fabrication: 1984
Heures de vol:3523
Cycles:1831
Moteurs: 4 Soloviev D-30KP-2
Equipage:victimes: 8 / à bord: 8
Passagers:victimes: 2 / à bord: 2
Total:victimes: 10 / à bord: 10
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:1,5 km (0.9 milles) de Chkalovsky Airport (CKL) (   Fédération de Russie)
Phase de vol: En montée initiale (ICL)
Nature:Cargo
Aéroport de départ:Chkalovsky Airport (CKL/UUMU), Fédération de Russie
Aéroport de destination:Noril'sk Airport (NSK/UOOO), Fédération de Russie
Numéro de vol:9633
Détails:
The Ilyushin was operating on a cargo flight from Chkalovsky to Taiyuan, China. Intermediate stops were planned at Noril'sk and Bratsk. Weather at Chkalovsky included fog with a visibility of 500-900 m, vertical visibility 70-80 m, temperature +8deg C. The aircraft was prepared for departure and, according to the loading documents, loaded with 40,2 tons of cargo. The takeoff weight would thus be 191,9 tons. However, the cargo was not properly weighed and the actual takeoff weight was approximately 204 tons, which exceeded the maximum permissible weight by 14 tons. Flaps were set at 30°, slats to 14°, and the stabilizer was at 5,4° airplane nose up. After accelerating down the runway, the captain started to rotate at a speed of 250 km/h (135 kts), lifting off at a speed of 290 km/h (157 kts) after a takeoff run of 2700 m. The undercarriage was raised and at the height of approximately 10 meters, the captain carried out a right-hand turn with a 7 deg bank to compensate for a slight deviation to the left during takeoff. At a height of about 23 m the stabilizer was trimmed from -5,4° to -3,9° without using elevator to compensate. The Ilyushin then descended to about 20 m before it contacted trees, 930 m past the end of the runway. The no. 3 and 4 engines were destroyed by the impact and the airplane descended further until contacting terrain at 1460 m past the end of the runway.
The investigation into the cause of the accident revealed a large number of problems in the operations and maintenance of the Russ Air Transport Company, the Atruvera company and also in the flight service organization of Chkalovsky Airport.

Probable Cause:

According to fact-finding of the commission, the accident occurred because of the collision with obstacles in the section of the initial climb due to the failure of the crew to maintain a safe climb trajectory as a result of the unfavorable combination of the following factors:

- organizational shortcomings during the inspection and the documentation of cargo at the Chkalovsky Airport, that did not exclude the possibility of loading the aircraft to a weight of above the mtow;

- exceeding the limitation of the maximum permissible takeoff weight of the aircraft (according to the data of studies it was exceeded by 13,6 - 14 tons);

- it was not detected in proper time that the captain had the habit of trimming the stabilizer at a height lower than height of the beginning of the retracting of the flaps as established for Il-76 aircraft, which led the aircraft to depart from the safe trajectory of climb, and subsequently to the collision with the obstacles;

- insufficient interaction between the crew members during a takeoff in conditions of restricted visibility, because the copilot and navigator did not monitor the flight altitude;

- the restricted visibility (local fog), which did not allow crew to see the obstacles and to avoid a collision;

- the presence of natural obstacles (forest) in the approach zone with a magnetic takeoff heading of 121° at Chkalovsky Airport, that does not correspond to the current requirements for the operation of civil airfields (Ngea-92).

Sources:
» Russian Ministry of Transport


Opérations de secours
Following the accident the AOC of Russ Air was revoked.

Photos

photo of Ilyushin-Il-76TD-RA-76588
accident date: 14-07-2001
type: Ilyushin Il-76TD
registration: RA-76588
 

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 Chkalovsky Airport et Noril'sk Airport est de 2797 km (1748 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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Ilyushin Il-76

  • 938+ built
  • 44ème loss
  • 21ème accident fatal
  • le accident 11ème le plus grave (à ce moment là)
  • le accident 20ème le plus grave (en ce moment)
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