Aeroflot Flight 7425

Aeroflot Flight 7425
	An Aeroflot Tupolev Tu-154B-2 similar to the accident aircraft
Accident
Date	10 July 1985
Summary	Pilot error and fatigue
Site	Uchkuduk, Uzbek SSR, Soviet Union ; 42°9′24″N 63°33′20″E
Aircraft
Aircraft type	Tupolev Tu-154B-2
Operator	Aeroflot
Registration	CCCP-85311
Flight origin	Karshi Airport
Stopover	Ufa Airport
Destination	Pulkovo Airport
Occupants	200
Passengers	191
Crew	9
Fatalities	200
Survivors	0

Aeroflot Flight 7425[nb 1] was a domestic scheduled Karshi–Ufa–Leningrad passenger flight that crashed near Uchkuduk, Uzbek SSR, Soviet Union on 10 July 1985. The crash killed all 200 occupants (148 adults, including 9 crewmembers, and 52 children) on board. Investigators determined that crew fatigue was a factor in the accident.[2]

Passengers and Crew

Flight 7425 was serviced by a Tupolev Tu-154B-2, registration CCCP-85311. Led by pilot-in-command Oleg Pavlovich Belisov, the cockpit crew consisted of co-pilot Anatoly Timofeevich Pozyumsky, navigator Garry Nikolaevich Argeev, and flight engineer Abduvahit Sultanovich Mansurov. There were five flight attendants in the cabin.[3]

Accident

The aircraft was operating the first leg of the flight, and cruising at 11,600 metres (38,100 ft) with an airspeed of 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.[2]

Wreckage of Flight 7425

Flight 7425 remains 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

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 incident. They found Flight 7425's flight crew were very fatigued at the time of the crash from having spent the prior 24 hours at the departure airport prior to takeoff. Another factor was inadequate regulations for crews encountering abnormal conditions.[4]

gollark: Are you trying to store data there for some weird reason?

gollark: You can store a bit of information in specific EFI variables.

gollark: I mean, your question is... weirdly vague, what do you mean exactly?

gollark: Why does anyone even use these "BTUs"?

gollark: You know, I bet old enough servers might be cheaper than actual electric heaters.

Notes

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

References

"Катастрофа Ту-154Б-2 Узбекского УГА в районе пос.Учкудук" [Accident Tu-154B-2 of the Uzbek UGA near the village Uchkuduk] (in Russian).
Accident description at the Aviation Safety Network. Retrieved on 19 February 2015.
"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.
Gero, David (1996). Aviation Disasters Second Edition. Patrick Stephens Limited. p. 187.

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

[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).

[ASN-3] Accident description at the Aviation Safety Network. Retrieved on 19 February 2015.

[4] "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.

[Gero-5] Gero, David (1996). Aviation Disasters Second Edition. Patrick Stephens Limited. p. 187.

Aviation accidents and incidents in the Soviet Union and Russia
1950s	1950 Sverdlovsk plane crash Aeroflot Flight 4 1958 Aeroflot Tu-104 Kanash crash Aeroflot Flight 315 (1959) Aeroflot Flight 120
1960s	Aeroflot Flight 315 (1960) Aeroflot Flight 207 Austrian Airlines Flight 901 Aeroflot Flight 68 Aeroflot Flight 245 Aeroflot Flight 902 Aeroflot Flight 415 Aeroflot Flight 191 Aeroflot Flight 3 Aeroflot Flight 25 Aeroflot Flight 12 CCCP-45021 Aeroflot Flight 663 Aeroflot Flight 721 Aeroflot Flight 20 Aeroflot Flight 513 Aeroflot Flight 99 Aeroflot Flight 65 Aeroflot Flight 2723 Aeroflot Flight 5003 (1967) Aeroflot Flight 2230 Aeroflot Flight 51 Aeroflot Flight 15 Aeroflot Flight 831 Aeroflot Flight 826 1969 Yukhnov mid-air collision
1970s	Aeroflot Flight U-45 Aeroflot Flight 1661 CCCP-11000 CCCP-12996 Aeroflot Flight 1969 Aeroflot Flight 1912 Malév Flight 110 Aeroflot Flight 773 Aeroflot Flight 2174 Aeroflot Flight 1491 Aeroflot Flight 558 Aeroflot Flight 1036 Aeroflot Flight 217 Japan Airlines Flight 446 Aeroflot Flight 6263 Aeroflot Flight 141 Aeroflot Flight 630 Balkan Bulgarian Airlines Flight 307 Aeroflot Flight 6551 Aeroflot Flight 109 Aeroflot Flight 13 Aeroflot Flight 3932 Aeroflot Flight 964 Aeroflot Flight 19 Aeroflot Flight 2022 CCCP-75559 1974 Surgut mid-air collision Aeroflot Flight 2003 Aeroflot Flight 3739 (1976) Aeroflot Flight 909 Aeroflot Flight 1802 Aeroflot Flight 418 1976 Anapa mid-air collision Aeroflot Flight 2415 Aeroflot Flight 36 (1976) Aeroflot Flight 3843 Aeroflot Flight 5003 (1977) Aeroflot Flight 331 CCCP-65639 Aeroflot Flight 2 Korean Air Lines Flight 902 Aeroflot Flight 1080 Aeroflot Flight 1691 1979 Dniprodzerzhynsk mid-air collision Aeroflot Flight 5484
1980s	Aeroflot Flight 4225 1981 Pushkin Tu-104 crash Aeroflot Flight 498 1981 Armenia mid-air collision Aeroflot Flight 811 Aeroflot Flight 3603 Aeroflot Flight 8641 Aeroflot Flight 411 Aeroflot Flight 343 Aeroflot Flight 5463 Aeroflot Flight 601 Aeroflot Flight 3352 Aeroflot Flight 3519 Aeroflot Flight 7841 Aeroflot Flight 8381 Aeroflot Flight 7425 Aeroflot Flight 101/435 Aeroflot Flight 2306 Aeroflot Flight 6502 Aeroflot Flight 892 Aeroflot Flight 505 Aeroflot Flight 528 Aeroflot Flight 3739 (1988) Korean Air Lines Flight 007
1990s	Aeroflot Flight 2808 (1992) Sakha Avia Flight 301 (1993) Aeroflot Flight 593 (1994) Stavropolskaya Aktsionernaya Avia Flight 1023 (1997)
2000s	Vladivostok Air Flight 352 (2001) Siberia Airlines Flight 1812 (2001) Pulkovo Aviation Enterprise Flight 9560 (2002) 2004 Russian aircraft bombings (2004) Armavia Flight 967 (2006) S7 Airlines Flight 778 (2006) Aeroflot Flight 821 (2008)
2010s	Smolensk air disaster (2010) Dagestan Airlines Flight 372 (2010) Kolavia Flight 348 (2011) RusAir Flight 9605 (2011) Lokomotiv Yaroslavl plane crash (2011) Red Wings Airlines Flight 9268 (2012) Tatarstan Airlines Flight 363 (2013) 2014 Vnukovo Airport Falcon 50 crash (2014) Flydubai Flight 981 (2016) 2016 Russian Defence Ministry Tupolev Tu-154 crash (2016) Khabarovsk Airlines Flight 463 (2017) Saratov Airlines Flight 703 (2018) Aeroflot Flight 1492 (2019) Ural Airlines Flight 178 (2019)