
Détails:
Pulkovo flight 612 departed Anapa (AAQ) for St. Petersburg (LED) at 15:05. The Tu-154M climbed to the cruise altitude of 35,100 feet (10.700 m). Because of storm cells ahead, the pilot decided to change course laterally by 20 km and attempted to climb over the storm cells. However, the thunderstorm front was unusually high, extending up to 15 km (49,000 feet). The Tu-154 entered an area of severe turbulence, pushing up the airplane from 11.961 m to 12.794 m within just 10 seconds. The angle of attack increased to 46 degrees and the airspeed dropped to zero. It entered a deep stall from which the crew could not recover. The plane crashed and burned in a field.
The cause of the crash was the loss of control in the manual flight mode with supercritical angles of attack, causing a stall with the subsequent transition to a flat spin and collision with the ground with a large vertical velocity. Factors were considered poor crew coordination, and failure to follow the instructions in the Aeroplane Flight Manual to prevent a stall. Also, the crew training methods used were insufficient to demonstrate the dangers of manual flight at high altitudes.
» RIA Novosti
» MAK Interstate Aviation Committee (IAC)
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
| Statuts: | Accident investigation report completed and information captured |
| Date: | mardi 22 août 2006 |
| Heure: | 15:39 |
| Type/Sous-type: |  Tupolev Tu-154M |
| Compagnie: | Pulkovo Aviation Enterprise |
| Immatriculation: | RA-85185 |
| Numéro de série: | 91A894 |
| Année de Fabrication: | 1991 |
| Heures de vol: | 24215 |
| Moteurs: | 3 Soloviev D-30KU-154-II |
| Equipage: | victimes: 10 / Ã bord: 10 |
| Passagers: | victimes: 160 / Ã bord: 160 |
| Total: | victimes: 170 / Ã bord: 170 |
| Dégats de l'appareil: | Détruit |
| Conséquences: | Written off (damaged beyond repair) |
| Lieu de l'accident: | 45 km (28.1 milles) NW of Donetsk ( Ukraine)
|
| Phase de vol: | En vol (ENR) |
| Nature: | Transport de Passagers Nat. |
| Aéroport de départ: | Anapa Airport (AAQ/URKA), Fédération de Russie |
| Saint Petersburg-Pulkovo Airport (LED/ULLI), Fédération de Russie | |
| Numéro de vol: | FV612 |
Pulkovo flight 612 departed Anapa (AAQ) for St. Petersburg (LED) at 15:05. The Tu-154M climbed to the cruise altitude of 35,100 feet (10.700 m). Because of storm cells ahead, the pilot decided to change course laterally by 20 km and attempted to climb over the storm cells. However, the thunderstorm front was unusually high, extending up to 15 km (49,000 feet). The Tu-154 entered an area of severe turbulence, pushing up the airplane from 11.961 m to 12.794 m within just 10 seconds. The angle of attack increased to 46 degrees and the airspeed dropped to zero. It entered a deep stall from which the crew could not recover. The plane crashed and burned in a field.
Probable Cause:
The cause of the crash was the loss of control in the manual flight mode with supercritical angles of attack, causing a stall with the subsequent transition to a flat spin and collision with the ground with a large vertical velocity. Factors were considered poor crew coordination, and failure to follow the instructions in the Aeroplane Flight Manual to prevent a stall. Also, the crew training methods used were insufficient to demonstrate the dangers of manual flight at high altitudes.
Accident investigation:

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|
Sources:
» 'Climb over storm' doomed Tu-154 (Flight 05/09/06)» RIA Novosti
» MAK Interstate Aviation Committee (IAC)
Photos
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
accident date: 22-08-2006
type: Tupolev Tu-154M
registration: RA-85185
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 Anapa Airport et Saint Petersburg-Pulkovo Airport est de 1700 km (1062 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.
La distance entre Anapa Airport et Saint Petersburg-Pulkovo Airport est de 1700 km (1062 miles).
Accident location: Global; accuracy within tens or hundreds of 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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Tupolev Tu-154
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