Aeroflot Flight 1969

Aeroflot Flight 1969
	An Antonov An-10 similar to the accident aircraft
Accident
Date	31 March 1971
Summary	Mechanical failure
Site	13 km south-west of Voroshilovgrad Airport
Aircraft
Aircraft type	Antonov An-10
Operator	Aeroflot
Registration	CCCP-11145
Flight origin	Kurumoch International Airport
Destination	Luhansk International Airport
Occupants	65
Passengers	57
Crew	8
Fatalities	65
Survivors	0

Aeroflot Flight 1969 was a passenger flight operated by an Antonov An-10 that crashed during the approach to Luhansk on 31 March 1971, resulting in the death of all 65 people on board. An investigation revealed that the Antonov's right wing failed structurally during approach to Luhansk International Airport.

Accident

Flight 1969 was a scheduled domestic flight from Kurumoch to Luhansk. At 11:13 local time the An-10 departed Kurumoch International Airport and climbed to a cruising altitude of 7,800 meters. After passing a waypoint at Rostov the crew was instructed by air traffic control (ATC) to descend to an altitude of 5,700 meters. Shortly afterwards the crew received a report of weather conditions at the destination airport: solid clouds with a base of 600 meters, visibility 10 km, wind 50 degrees at eight meters per second with gusts up to 12 meters per second.[1][2][3]

At 12:58:46 the crew reported an altitude of 1,200 meters and were given permission to continue their descent to 600 meters. The crew's last transmission was at 12:58:50 when they reported they were continuing to descend. Before the An-10 reached 600 meters, approximately 13 square meters of the right wing including an aileron, separated from the rest of the aircraft severing hydraulic lines during the process. Part of the detached wing section struck the right horizontal stabilizer, damaging its structure while tearing off part of it and its elevator. The aircraft immediately yawed right and entered a steep bank also to the right. As the Antonov plummeted towards the ground both right engines lost oil pressure, causing their propellers to go into fine pitch, inducing both of them to rotate at very high rpm. At 12:59:30 the aircraft struck the ground in a 60 degree pitch down, 50 degree bank right attitude, killing all 65 people on board.[1][2][3]

Aircraft

The Antonov An-10 involved was serial number 8400701 and registered as CCCP-11145 to Aeroflot. The construction of the airliner was completed on 31 December 1958 and it had sustained a total of 14,337 flight hours and 9,081 takeoff and landing cycles at the time of the crash.[1][2][3]

Investigation

Investigators discovered that a riveted seam of the right wing nine ribs wide had separated in flight due to excessive shear loads. The investigators focused on two scenarios that could have led to the accident. The first was that the wing fractured due to over pressurization. It was theorized that if the vent outlet of the air bleed anti ice system were blocked by ice build up, too much pressure could cause a riveted seam to split open. Static testing with partially and completely blocked outlets showed that the pressure build up was negligible, due mostly to the systems design having numerous other paths for the bleed air to escape. The second synopsis was based on weakness of the joint due to a defect and/or fatigue cracks near the riveted seam. Testing of similar structures under laboratory conditions were performed but no weakening of the wing panel was found. Investigators failed to find the root cause of the wing panel failure and an official cause of the accident was never established.[1]

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gollark: It's called Bedrock Edition.

gollark: Mojang keep horribly mucking it up even with foamfix and whatnot.,

gollark: Yes, especially modded.

gollark: Well, it shouldn't need more than 4 or 5.

References

"Catastrophe An-10 Privolzhsky UGA near Voroshilovgrad". airdisaster.ru (in Russian). Retrieved 2018-07-04.
"Accident description Wednesday 31 March 1971". aviation-safety.net. Retrieved 2018-07-04.
"Accident description March 31, 1971". planecrashinfo.com. Retrieved 2018-07-04.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.

[airu-1] "Catastrophe An-10 Privolzhsky UGA near Voroshilovgrad". airdisaster.ru (in Russian). Retrieved 2018-07-04.

[avasf-2] "Accident description Wednesday 31 March 1971". aviation-safety.net. Retrieved 2018-07-04.

[pla-3] "Accident description March 31, 1971". planecrashinfo.com. Retrieved 2018-07-04.

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)

Aeroflot Flight 1969

Accident

Aircraft

Investigation

See also

References