Aeroflot Flight U-505
Accident
An Aeroflot Yak-40, similar to the one involved.
Date	13 April 1987 (1987-04-13)
Summary	Wake turbulence
Site	Tashkent Airport, Tashkent, Uzbekistan
Aircraft
Aircraft type	Yakovlev Yak-40
Operator	Aeroflot
Registration	CCCP-87618
Flight origin	Tashkent Airport, Soviet Uzbekistan, USSR
Destination	Shahrisabz, Soviet Uzbekistan, USSR
Occupants	9
Passengers	5
Crew	4
Fatalities	9
Survivors	0

Aeroflot Flight U-505 crashed just after takeoff in Tashkent on 13 April 1987. Flight 505 was an early morning flight from Tashkent to Shahrisabz, both in the Uzbek Soviet Socialist Republic, now the Republic of Uzbekistan. The flight took off just one minute and 28 seconds after an Ilyushin Il-76, thus encountering its wake vortex. The Yakovlev Yak-40 then banked sharply to the right, struck the ground, and caught fire. All 9 people on board died.^[1]^[2]

Aircraft and crew

The aircraft involved, a Yakovlev Yak-40, was registered to Aeroflot as CCCP-87618. At the time of the accident, the aircraft had sustained 17,132 flight hours and 20,927 cycles (one cycle equals one takeoff and landing).^[2]

The crew consisted of the following:^[3]

Captain T. Yunusbek (Юнусбеков Т.)
Co-pilot Valery Strunin (Струнин Валерий Александрович)
Flight engineer R. F. Davydov (Давыдов Р. Ф.)

Sequence of events

The plane was scheduled to ferry cargo from Tashkent to Shakhrisabz. On board were 1,200 kilograms of mail and 35 kilograms of personal luggage, along with four passengers seated in the cabin. Takeoff weight was 14.4 tons, within the acceptable range. The crew was in a hurry to depart because the cargo was not loaded until 6:00 local time and they were scheduled to depart Tashkent at 5:55; hence the crew took less than a minute to complete the preflight checklist instead of the usual five minutes. They proceeded to start taxiing on taxiway three to Runway 8L. At 6:09:40 the Il-76 (CCCP-76482) took off from the runway. Immediately they contacted the control tower and requested clearance for takeoff. After receiving permission to taxi onto the runway, and at 6:10:58 they took off without explicit permission to take off, in violation of procedure. The crew put the engines to full power accelerating at 124.2 knots; but at 6:11:04 when the aircraft was no more than 20 meters off the ground it started to bank sharply to the right and at 6:11:15 it crashed into the ground, killing all nine people aboard.^[4]

Cause

The Yak-40 took off 1 minute and 28 seconds after an Ilyushin Il-76. When investigating the causes of the disaster the commission found that despite the IL-76's position it still would have left wake turbulence. The wind was only 1 mph, leading to the conclusion that the behavior of the aircraft Yak-40 can be explained only by hitting the wake turbulence of a much heavier Il-76 taking off from the same runway in just 1 minute 15 seconds before the Yak-40. Tashkent Airport had a minimum takeoff interval of only one minute, regardless of aircraft type, leading to the relatively small Yak-40 quickly losing control and crashing upon encountering the wake vortex.^[4]

References

^ "ASN Aircraft accident Yakovlev 40 CCCP-87618 Tashkent-Yuzhny Airport (TAS)". aviation-safety.net. Aviation Safety Network. Archived from the original on 2005-04-06. Retrieved 2017-12-29.
^ ^a ^b "Яковлев Як-40 Бортовой №: СССР-87618" [Yakovlev Yak-40 Board number: USSR-87618]. russianplanes.net (in Russian). Archived from the original on 2012-10-30. Retrieved 2017-01-09.
^ "160187 - Авиакатастрофы - - Каталог статей - Любителям гражданской авиации посвящается..." [160187 - Plane accidents - Catalog of articles - Dedicated to fans of civil aviation...]. dream-air.ru (in Russian). Archived from the original on 2017-12-29. Retrieved 2017-12-29.
^ ^a ^b "Катастрофа Як-40 Узбекского УГА в а/п Ташкент-Южный" [Accident of Yak-40 of the Uzbek UGA at the airport Tashkent-Yuzhny]. www.airdisaster.ru (in Russian). Archived from the original on 2009-03-03. Retrieved 2017-01-09.

Aeroflot

Part of the SkyTeam alliance

Subsidiaries

Active	Pobeda Rossiya
Inactive	Dobrolet Donavia Orenair SAT Airlines Vladivostok Air
Exited	Aurora Nordavia (now Smartavia)

Fleet

Accidents and
incidents

1950s	Flight 31 (1955) Flight 04 Тu-104 Kanash crash Flight 120 Flight 200 Flight 315
1960s	Flight 315 Flight 207 Flight 036 Flight 068 Flight 245 Flight 902 Flight 415 Flight 03 Flight 213 Flight 191 Flight 25 Flight 012 Flight 366 Flight 663 Flight 721 Flight 101/X-20 Flight 542 Flight 513 Flight 99 Flight 065 Flight 2723 Flight 5003 Flight 2230 Flight L-51 Flight 1668 Flight 15 Flight 831 Flight N-826
1970s	Flight U-45 Flight 1661 Flight 3630 CCCP-11000 crash CCCP-12996 crash Flight 1969 Flight 1912 Flight 773 Flight 2174 Flight 1491 Flight 558 Flight 1036 Flight 217 Flight 6263 Flight 141 Flight 630 Flight 6551 Flight 109 Flight A-13 Flight 3932 Flight 964 Flight 19 Flight 2022 CCCP-75559 crash Flight 662 Flight 2003 Flight 3739 Flight 909 Flight 1802 Flight 418 Flights 7957 and 31 (1976) Flight 2415 Flight N-36 Flight 3843 Flight 5003 Flight 331 Flight B-2 Flight 6709 Flight 1080 Flight 1691 Flights 7628 and 7880 Flight 5484
1980s	Flight 4225 Flight 498 Flight 811 Flight 3603 Flight 8641 Flight 411 Flight 343 Flight 5463 Flight 601 Flight 3352 Flight 3519 Flight 7841 1985 Zolochiv mid-air collision Flight 5143 Flight 101/435 Flight 2306 Flight 6502 Flight 892 Flight U-505 Flight N-528 Flight 699 Flight 3739
since 1990s	CCCP-46472 crash Flight 2808 Flight 593 Flight 521 Flight 821 Flight 1492

Aviation accidents and incidents in 1987

Jan 3

Varig Flight 797

Jan 15

SkyWest Airlines Flight 1834

Jan 16

Aeroflot Flight U-505

Mar 4

Northwest Airlink Flight 2268

Apr 4

Garuda Indonesia Flight 035

May 8

American Eagle Flight 5452

May 9

LOT Flight 5055

May 19

Air New Zealand Flight 24

Jun 19

Aeroflot Flight N-528

Jun 26

Philippine Airlines Flight 206

Jul 24

Air Afrique Flight 056

Jul 30

Mexico City Boeing C-97 crash

Aug 16

Northwest Airlines Flight 255

Aug 31

Thai Airways Flight 365

Oct 15

Aero Trasporti Italiani Flight 460

Oct 20

Ramada Inn Corsair crash

Nov 15

Continental Airlines Flight 1713

Nov 28

South African Airways Flight 295

Nov 29

Korean Air Flight 858

Dec 7

Pacific Southwest Airlines Flight 1771

Dec 8

Alianza Lima disaster

Dec 13

Philippine Airlines Flight 443

Dec 23

Finnair Flight 915

1986 ◄ ► 1988

Aviation accidents and incidents in the Soviet Union

1930s	Osoaviakhim-1 SSSR-V6 Osoaviakhim
1940s	1948 Aeroflot Ilyushin Il-12 crash
1950s	1950 Sverdlovsk plane crash LOT Polish Airlines Flight 232 Aeroflot Flight 04 1958 Aeroflot Tu-104 Kanash crash Aeroflot Flight 315 (1959) Aeroflot Flight 120 Aeroflot Flight 200
1960s	Aeroflot Flight 315 (1960) U-2 incident Aeroflot Flight 207 RB-47 shootdown incident Aeroflot Flight 036 Austrian Airlines Flight 901 Aeroflot Flight 068 Aeroflot Flight 245 Aeroflot Flight 902 Aeroflot Flight 415 Aeroflot Flight 213 (1962) Aeroflot Flight 191 Aeroflot Flight 03 Aeroflot Flight 25 Aeroflot Flight 012 Aeroflot Flight 366 Aeroflot Flight 663 Aeroflot Flight 721 Aeroflot Flight 101/X-20 Aeroflot Flight 542 Aeroflot Flight 513 Aeroflot Flight 99 Aeroflot Flight 065 Aeroflot Flight 2723 Aeroflot Flight 5003 (1967) Aeroflot Flight 2230 Aeroflot Flight L-51 Aeroflot Flight 15 Seaboard World Airlines Flight 253A 1969 Yukhnov mid-air collision Aeroflot Flight N-826
1970s	Aeroflot Flight U-45 Aeroflot Flight 1661 Dymshits–Kuznetsov hijacking affair Aeroflot Flight 3630 Aeroflot Flight 244 22 January 1971 Surgut Aeroflot Antonov An-12 crash 31 January 1971 Surgut Aeroflot Antonov An-12 crash Aeroflot Flight 1969 Aeroflot Flight 1912 Malév Flight 110 Aeroflot Flight 773 Aeroflot Flight N-63 Aeroflot Flight 2174 Aeroflot Flight 1491 Aeroflot Flight 558 Aeroflot Flight 1036 Aeroflot Flight 217 Japan Air Lines Flight 446 Aeroflot Flight 6263 Aeroflot Flight 141 Aeroflot Flight 630 Balkan Bulgarian Airlines Flight 307 Aeroflot Flight 6551 Aeroflot Flight 109 Aeroflot Flight A-13 Aeroflot Flight 3932 Aeroflot Flight 964 Aeroflot Flight 19 Aeroflot Flight 2022 1974 Leningrad Aeroflot Il-18 crash 1974 Surgut mid-air collision Aeroflot Flight 2003 Aeroflot Flight 3739 (1976) Aeroflot Flight 909 Aeroflot Flight 1802 Aeroflot Flight A-53 Aeroflot Flight 418 1976 Anapa mid-air collision Aeroflot Flight 2415 Aeroflot Flight N-36 Aeroflot Flight 3843 Aeroflot Flight 5003 (1977) 1977 Aeroflot Tupolev Tu-134 hijacking Aeroflot Flight B-2 Aeroflot Flight 6709 Korean Air Lines Flight 902 1978 Yegoryevsk Tu-144 crash Iranian Chinook shootdown Aeroflot Flight 1080 Aeroflot Flight 1691 1979 Dniprodzerzhynsk mid-air collision Aeroflot Flight 5484
1980s– Dec. 1991	Aeroflot Flight 4225 1981 Pushkin Tu-104 crash Aeroflot Flight 498 1981 Armenia mid-air collision 1981 Zheleznogorsk mid-air collision Aeroflot Flight 811 Aeroflot Flight 3603 Aeroflot Flight 8641 Aeroflot Flight 411 Aeroflot Flight 5463 Korean Air Lines Flight 007 Aeroflot Flight 601 Aeroflot Flight 3352 Aeroflot Flight 3519 Aeroflot Flight 7841 1985 Zolochiv mid-air collision Aeroflot Flight 5143 Aeroflot Flight 101/435 Aeroflot Flight 2306 Aeroflot Flight 6502 Aeroflot Flight U-505 Aeroflot Flight N-528 Aeroflot Flight 699 Aeroflot Flight 3739 (1988) 1988 Soviet Air Force Il-76 crash An-24 crash in Navoiy Aeroflot Flight 8556

v t e Aviation accidents and incidents in Uzbekistan
Aeroflot Flight 120 (December 1959) Aeroflot Flight U-45 (February 1970) Aeroflot Flight 5143 (July 1985) Aeroflot Flight U-505 (April 1987) An-24 crash in Navoiy (March 1991) Uzbekistan Airways Flight 1154 (January 2004)
This includes accidents in the Uzbek SSR and post-independence Uzbekistan

Aircraft and crew

Sequence of events

Cause

See also

References