Aeroflot flight 811

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Aeroflot flight 811
Antonov An-24RV, Aeroflot AN1089502.jpg

Aeroflot aircraft of the same construction
Accident summary
Accident type Airplane collision in the air
place 70 km east of Sawitinsk , Soviet Union
date August 24, 1981
Fatalities 37
Injured 1
1. Aircraft
Aircraft type Antonov An-24 -RW
operator Aeroflot
Mark CCCP-46653
Departure airport Yuzhno-Sakhalinsk Airport
Stopover Komsomolsk-on-Amur Airport
Destination airport Blagoveshchensk-Ignatievo airport
Passengers 27
crew 5
Survivors 1
2. Aircraft
Aircraft type Tupolev Tu- 16K
operator Soviet Air Force
Mark 07514
Departure airport Sawitinsk Airport
Destination airport Sawitinsk Airport
Passengers 0
crew 6th
Survivors 0
Lists of aviation accidents

On August 24, 1981, an Antonov An-24 collided with a Tupolev Tu-16 of the Soviet Air Force in the air on the second segment of the inner-Soviet scheduled flight Aeroflot - Flight 811 from Yuzhno-Sakhalinsk via Komsomolsk on the Amur to Blagoveshchensk . Larissa Savitskaya, who was 20 years old at the time, was the only survivor of the 38 passengers in both aircraft.

Aircraft and crew

The aircraft of Aeroflot was a seven-year-old Antonov An-24 RW ( air vehicle registration : CCCP-46653 , station number : 47309204 ), with two turboprop engines of the type Ivchenko AI-24VT was equipped, used from May 2, 1974, to Accident completed 12,828 hours of operation and 8,397 flight cycles.

The crew consisted of the flight captain Alexander Wassiljewitsch Mirgorodskij, the first officer Valeri Grigoryevich Shevelyov, the navigator Fjodosij Ivanovich Krischanowskij as well as the flight attendant Nikolai Ivanovich Dimitriew and the flight attendant Galina Petrovna Borissowa.

The other aircraft was a 25-year-old Tupolev Tu-16 K (aircraft registration number 07514, serial number 6203106), which was in service from March 31, 1956 and had completed 4019 operating cycles and 2870 flight cycles up to the accident.

course

The An-24 took off at 7:56 MSK (2:56 p.m. local time in Komsomolsk-on-Amur) with a weather-related four-hour delay, which was reported to Blagoveshchensk air traffic control. At 8:30 a.m., the air traffic controller in Archara received the information from his colleague in Khabarovsk that the An-24 would fly into his area of ​​responsibility at 8:55 a.m. at an altitude of 5,400 m. At 8:57 a.m., the pilots reported to the air traffic controller in Archara that they had flown into the area, which the latter confirmed. He named their distance of 225 km and the azimuth from Archara to the pilots of 42 ° (northeast) and gave the clearance to fly on at 5,400 m on the airway from Khabarovsk to Moscow .

Meanwhile, at 9:00 a.m. and 9:01 a.m., MSK took off a Tupolev Tu-16 in Savitinsk. The two heavy bombers flew at 9:18 am at an altitude of 4,200–4,500 m at a distance of 6 km past the point Bachirewo, should then rise to 7,800–8,100 m and fly to another point with the following coordinates .

The controller was informed of the flight plan for the area around Blagoveschensk at 2:00 a.m. MSK before the start of the shift. According to the flight plan, the planes taking off from Sawitinsk would encounter military traffic at an altitude of 4200-4500 m on the airway between Bureja and Tschegdomyn at 9:00, 14:00 and 19:00. At 9:07 a.m. MSK, the pilots of the An-24 reported their altitude of 5,400 m, whereupon the pilot informed them of their position. At 9:15 MSK he did this again. The Aeroflot pilots did not respond to any of the following radio messages.

At 9:21:07 a.m. MSK (3:21:07 p.m. local time) the An-24 collided with one of the two Tu-16s at 5,220 m in good visibility (10 km visibility) between the clouds, 3 km off the Bureja airway -Tschegdomyn. The An-24 broke into several parts, which were distributed 1,020 m southwest of the collision point on a marshy, mountainous and wooded area of ​​2,500 × 900 m. The parts of the Tu-16 fell 2,000 m southeast of the collision point. Both wrecks burned out.

Soldiers searched for the Tu-16 ammunition and, 3 days after the accident, found Larissa Savitskaya the only one alive who had traveled with her husband Vladimir and was asleep at the time of the collision. She suffered fractures in an arm, a leg and a rib, as well as bruises and abrasions on her face. Until then, she had survived by drinking rainwater and berry porridge because she could not chew because of her broken teeth.

Investigations

According to a request from the military, 2 Tupolev Tu-16s, including the one that crashed, were to take off on that day with callsigns 07034 and 07514 for weather reconnaissance. This was then sent to air traffic control in Khabarovsk, confirmed there unchanged and forwarded to the military sector in Blagoveshchensk. This in turn developed a corresponding flight plan in which the flight route of the Tu-16 was to intersect the airway at 4,200-4,500 m and reported it to the civilian sector there. Confirmation from the civil sector was sent to the Departmental Center of the Military Sector of Blagoveshchensk and to the Savitinsk Airport. However, the information that the crossing should take place at 4,200–4,500 m was lost, so that the crossing could take place at any height.

In the air traffic control in Sawitinsk, the situation in the airspace was not analyzed during the preparation, even before the shift change, and the airport manager had failed to follow the flight of the Tu-16 on the radar. The exchange of information between the sectors in Blagoveshchensk and between each other and with Khabarovsk about responsibility and the situation in the respective airspace was inadequate.

This was exacerbated by problems in administration by the military leadership. She had not checked whether all the information had actually reached Savitinsk. The regulations for military flights have not been revised since February 1980. At the time of the accident, for example, it was not mandatory for the civil and military sectors to exchange information about delays, the actual departure time, transit flights and, in general, when an aircraft was entering the airspace. The pilots of the two Tu-16s therefore did not know about the An-24 on the airway in their vicinity. Conversely, in Blagoveshchensk, the civil sector of the military sector did not know the actual departure time of the Tu-16.

Conclusions

Ultimately, poor airspace control around Savitinsk and poor communication between the sectors in connection with poor organization were seen as the cause of the accident.

swell

Coordinates: 50 ° 0 ′ 36 ″  N , 130 ° 16 ′ 48 ″  E