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Last updated: 5 August 2021
Date:mercredi 21 mai 1986
Type/Sous-type:Silhouette image of generic T154 model; specific model in this crash may look slightly different
Tupolev Tu-154B-2
Compagnie:Aeroflot, Krasnoyarsk Civil Aviation Directorate
Immatriculation: CCCP-85327
Numéro de série: 79A327
Année de Fabrication: 1979
Heures de vol:11922
Moteurs: 3 Kuznetsov NK-8-2U
Equipage:victimes: 0 / à bord:
Passagers:victimes: 0 / à bord: 175
Total:victimes: 0 / à bord:
Dégats de l'appareil: Perte Totale
Conséquences: Written off (damaged beyond repair)
Lieu de l'accident:Moskva-Sheremetyevo Airport (SVO) (   Fédération de Russie)
Phase de vol: En vol (ENR)
Nature:Transport de Passagers Nat.
Aéroport de départ:Chelyabinsk Airport (CEK/USCC), Fédération de Russie
Aéroport de destination:Moskva-Domodedovo Airport (DME/UUDD), Fédération de Russie
Prior to takeoff from Chelyabinsk the crew forgot to activate the pitot heating system. The departure and en route part of the flight were uneventful until the flight was descending for Domodedovo. At an altitude of 3600 m the Tu-154 passed a zone of heavy rainfall and icing. This caused blocking of the pitot tube and incorrect airspeed indications. The airspeed indicator soon went down to zero. The crew mistakenly thought the aircraft was about to stall. They immediately entered a steep descent with the engines at takeoff power. Then aircraft was levelled again at a height of 800 meters. The descent had been flown at a maximum of 100 m/s at a high speed of 813 km/h. The airplane pulled 3.2 G in the process. The high loads on the airframe caused substantial structural damage. The airplane landed safely at Domodedovo.

Probable Cause:

By the reason for emergency were improper actions of crew for the piloting during the distorted indications of the indicators of the indicated speed in icing conditions because of not the start it heating PPD, which led to the recovery to the uncalculated flight conditions.

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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 Chelyabinsk Airport et Moskva-Domodedovo Airport est de 1473 km (921 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 tel qu'ils sont connus à ce jour.
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