Aeroflot flight 3843
| Aeroflot flight 3843 | |
|---|---|
 Former aircraft of the same construction for the airline |
|
| Accident summary | |
| Accident type | Loss of control after engine fire |
| place | Near Alma-Ata Airport , Kazakh SSR
|
| date | January 13, 1977 |
| Fatalities | 90 |
| Survivors | 0 |
| Aircraft | |
| Aircraft type |
Tupolev Tu-104 A, Soviet Union.svg){kind=small}
|
| operator |
Aeroflot , Soviet Union
|
| Mark | CCCP-42369, Soviet Union
|
| Departure airport |
Khabarovsk Airport , Russian SFSR.svg){kind=small}
|
| Stopover |
Novosibirsk Airport , Russian SFSR
|
| Destination airport | Alma-Ata Airport, Kazakh SSR
|
| Passengers | 82 |
| crew | 8th |
| Lists of aviation accidents | |
On January 13, 1977, a Tupolev Tu-104 crashed on the inner-Soviet scheduled flight Aeroflot flight 3843 from Khabarovsk via Novosibirsk to Alma-Ata (today: Almaty ) while approaching, killing all 90 occupants. Up until Aeroflot flight 4225 , it was the most serious aircraft accident in what is now Kazakhstan and is now the second most serious, together with Aeroflot flight 5463.
Plane and crew
The aircraft was a Tupolev Tu-104A (aircraft registration number CCCP-42369, serial number : 86601203), which completed 27,189 flight hours and 12,819 flight cycles from October 31, 1958 until the accident.
The crew consisted of the flight captain Dmitri Danilowitsch Afanassjew, the first officer Vladimir Ivanovich Baburin, the flight engineer Anatoli Michailowitsch Schaforost, the navigator Alexander Wassiljewitsch Klimachin together with the inspector Anatoly Viktorovich Roschkovnaa, and the flight attendants Grlaid Kievinovinovija.
course
Indicate times outside of brackets in local time
The Tu-104 took off from Novosibirsk at 5:19 p.m. (1:19 PM Moscow time (MSK)) and climbed to a cruising altitude of 8,400 m. At 14:41 hrs MSK the pilots initiated the descent to 4,800 m, contacted an air traffic controller in Alma-Ata and received instructions for the further descent and an approach course of 230 ° (southwest). At a distance of 40 km, the plane sank from 2,100 to 500 m. Shortly afterwards, at 6:12 p.m. (3:12 p.m. MSK), in addition to distance (16 km), altitude and course, they reported a drift of 400 m from the approach baseline to the right (actually it was 1,600 m). When the air traffic controller asked the pilots to return to the approach course, the answer he received was: “понял, доворачиваю” (“Understood, I'm turning”). While the landing flaps were extended to 35 °, 12.5 km from the runway, there was a slow decrease in power in the left engine at 18:12:53. After vibrations started at 18:13:15, the pilots noticed the abnormal situation of the engine, they set the flaps to 20 ° and reported at 18:13:45, 8 km from the airport: "Заходим на одном двигателе, отказал левый двигатель ”(“ Coming with one engine, left engine failed ”). At 18:13:51 hrs, the pilots switched off the left engine by setting the thrust lever to "стоп" "Stop" and increased the thrust in the right engine. The Tu-104, which was initially too far to the right of the approach course, began to drift to the left and then flew away to the left. At 18:14:32, the pilots radioed 2 incomprehensible words. This was the last radio contact.
Eyewitnesses saw how the left engine had already burned 15 km from the runway and suddenly the nose of the aircraft rose; this happened between 18:14:18 and 18:14:21 and 3.5 km from the runway. During the climb from 195 to 285 m it came to a stall , whereupon the nose lowered again and the Tu-104 sank. It hit at 18:14:35, 3 seconds after the last radio message, with a downward pitch angle of 28 ° and without a bank, at a speed of 150–190 km / h and exploded. The wreck, which was broken into two parts, was found 3,280 m before the landing threshold and 480 m to the left of the runway center line on a flat, snow-covered field. The front part was dug 2 meters deep into the ground and burned out, but the rear part, which was thrown 18 m backwards, did not burn.
Investigations
At the time of the accident there was fog with a visibility of 1850 m, which corresponded to the required minimum weather conditions. Investigators found that a fire broke out in the left engine during the approach. A fuel line had developed a leak after presumably a hot air line leading to the pressurized cabin burst and blown hot air on it. The pilots were not informed of this; For example, the flight data recorder of the type MSRP-12-96 did not record a fire alarm before the flight data recorder failed at 18:14:15 and an exact reconstruction of the events afterwards became impossible. In addition, the pilots neither reported a fire nor operated the engine extinguishing system . The fire heated both the outer skin, which was exposed to it for between 10 and 15 minutes, as well as the thermal insulation materials behind it and the control rods. According to the state research institute for civil aviation ( GosNII GA ), these reached a temperature of 300–500 ° C, which indicated that they burned out during the flight and thus made control more difficult. The insulating materials released carbon monoxide , which the passengers inhaled, who possibly fled in a panic into the tail section of the aircraft, thereby shifting its center of gravity backwards. In addition, the crew suffered carbon monoxide poisoning .
swell
- Accident description (English) Tu-104A CCCP-42369 on the Aviation Safety Network , accessed on July 17, 2020
- Description of the accident (Russian) on airdisaster.ru, accessed July 17, 2020
- Description of the accident (Russian) on avia.pro, accessed on July 17, 2020
Coordinates: 43 ° 13 ′ 12 ″ N , 77 ° 3 ′ 36 ″ E