Accident description
Last updated: 25 October 2014
Status:
Date:Wednesday 10 July 1985
Time:23:46 MSK
Type:Tupolev 154B-2
Operator:Aeroflot / Uzbekistan
Registration: CCCP-85311
C/n / msn: 78A-311
First flight: 1978
Engines: 3 Kuznetsov NK-8-2U
Crew:Fatalities: 9 / Occupants: 9
Passengers:Fatalities: 191 / Occupants: 191
Total:Fatalities: 200 / Occupants: 200
Airplane damage: Destroyed
Airplane fate: Written off (damaged beyond repair)
Location:near Uchkuduk (   Uzbekistan) show on map
Phase: En route (ENR)
Nature:Domestic Scheduled Passenger
Departure airport:Karshi Airport (KSQ), Uzbekistan
Destination airport:Ufa Airport (UFA/UWUU), Russia
Flightnumber:7425
Narrative:
The Tupolev 154 departed Karshi (KSQ) on a flight to Leningrad (LED) via Ufa (UFA). The flight crew climbed to the cruising altitude of FL380 (11.600 m) at an airspeed of 400 km/h, which is close to stall speed under the given conditions. During cruise flight vibrations started because of the low airspeed. The crew assumed that the vibrations were caused by engine surges. They reduced power to flight idle, causing the airspeed to drop to 290 km/h. Trying to maintain altitude, the airplane eventually stalled. The Tu-154 went into a flat spin and crashed.

Classification:
Loss of control

Sources:
» Aviation Week & Space Technology (Jan.25 1993-p.57)
» Dmitriy Yerstov
» Izvestija
» Soviet Transports


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Karshi Airport to Ufa Airport as the crow flies is 1892 km (1182 miles).

This information is not presented as the Flight Safety Foundation or the Aviation Safety Networkĺs opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Tupolev 154

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