Aeroflot Flight 7425

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Aeroflot Flight 7425
Aeroflot Tu-154B-2 CCCP-85396 ZRH 1982-6-20.png
An Aeroflot Tupolev Tu-154B-2 similar to the accident aircraft
Accident
Date10 July 1985
SummaryPilot error
SiteUchkuduk, Uzbek SSR, Soviet Union
42°9′24″N 63°33′20″E / 42.15667°N 63.55556°E / 42.15667; 63.55556Coordinates: 42°9′24″N 63°33′20″E / 42.15667°N 63.55556°E / 42.15667; 63.55556
Aircraft
Aircraft typeTupolev Tu-154B-2
OperatorAeroflot
RegistrationCCCP-85311
Flight originKarshi Airport
StopoverUfa Airport
DestinationPulkovo Airport
Passengers191
Crew9
Fatalities200

Aeroflot Flight 7425[nb 1] refers to a Tupolev Tu-154B-2, registration CCCP-85311, that was operating a domestic scheduled KarshiUfaLeningrad passenger service under the airline's Uzbekistan division, that crashed near Uchkuduk, Uzbek SSR, Soviet Union on 10 July 1985. The crash killed all 200 occupants on board. Investigators determined that crew fatigue was a factor in the accident.[2]

Passengers and Crew[edit]

Flight 7425 had 139 adults and 52 children on board. The captain was Oleg Pavlovich Belisov, the co-pilot was Anatoliy Timofeevich Pozjumskij, the navigator was Harry N. Argeev, and the flight engineer was Abduvahit Sultanovich Mansurov. In the cabin were five flight attendants.[3]

Description of the accident[edit]

The aircraft was covering the first leg of the flight, cruising at an altitude of 11,600 metres (38,100 ft) with an airspeed of only 400 kilometres per hour (250 mph), close to stalling speed for that altitude. The low speed caused vibrations which the aircrew incorrectly assumed were engine surges. Using the thrust levers to reduce engine power to flight idle, the crew caused a further drop in airspeed to 290 km/h (180 mph). The aircraft stalled and entered a flat spin, crashing into the ground near Uchkuduk, Uzbekistan, at that time in the Soviet Union. There were no survivors among the 191 passengers and the 9 crewmen.[2]

It is the deadliest air disaster in Soviet and Uzbek aviation history, the deadliest in Aeroflot's history, and the deadliest accident involving a Tupolev Tu-154.[2]

Cause[edit]

Flight 7425's cockpit voice recorder was destroyed in the crash. Investigators with the help of psychologists studied the human factors that led to the aviation incident. Their findings were that Flight 7425's flight crew were very fatigued at the time of the crash due to their having to spend 24 hours at the departure airport prior to takeoff. Another factor in the crash was inadequate regulations for crews encountering abnormal conditions.[4]

See also[edit]

Notes[edit]

  1. ^ A Russian source claims the flightnumber was ″5143″.[1]

References[edit]

  1. ^ "Катастрофа Ту-154Б-2 Узбекского УГА в районе пос.Учкудук" [Accident Tu-154B-2 of the Uzbek UGA near the village Uchkuduk] (in Russian).
  2. ^ a b c Accident description at the Aviation Safety Network. Retrieved on 19 February 2015.
  3. ^ "Катастрофа Ту-154Б-2 Узбекского УГА в районе пос.Учкудук (борт СССР-85311), 10 июля 1985 года. // AirDisaster.ru - авиационные происшествия, инциденты и авиакатастрофы в СССР и России - факты, история, статистика" [Accident Tu-154B-2 of the Uzbek UGA near the village of Uchkuduk (board USSR-85311), July 10, 1985. // AirDisaster.ru - aviation accidents, incidents and plane crashes in the USSR and Russia - facts, history, statistics]. www.airdisaster.ru (in Russian). Retrieved 30 March 2017.
  4. ^ Gero, David (1996). Aviation Disasters Second Edition. Patrick Stephens Limited. p. 187.