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Crash of a Tupolev TU-134A near Zolochiv: 79 killed

Date & Time: May 3, 1985 at 1213 LT
Type of aircraft:
Operator:
Registration:
CCCP-65856
Flight Phase:
Survivors:
No
Schedule:
Tallin – Lviv – Chisinau
MSN:
23253
YOM:
1975
Flight number:
SU8381
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
72
Pax fatalities:
Other fatalities:
Total fatalities:
79
Aircraft flight hours:
18548
Aircraft flight cycles:
12306
Circumstances:
Following an uneventful flight from Tallin, the aircraft entered the TMA of Lviv and was cleared to descend from 4,800 meters to 4,200 meters. The crew was informed about the presence of an Antonov AN-26 that took off from Lviv-Sknyliv Airport at 1202LT and was climbing to 3,900 meters. En route to Moscow, the AN-26 was carrying 15 people, most of them officers from the Carpathian Military contingent. At 1212LT, the crew of the TU-134 was cleared to continue to descend below 4,200 meters. One minute later, while cruising in clouds at an altitude of 3,900 meters, both aircraft collided, entered a dive and crashed in an open field located near the city of Zolochiv, about 60 km east of Lviv. Both aircraft were totally destroyed and all 94 occupants were killed.
Probable cause:
It was determined that the accident was the consequence of a poor radar coverage by ATC who failed to properly coordinate control and assistance to both planes. ATC in charge of the sector where the collision occurred cleared the crew of the TU-134 to continue to descend when he actually had no idea of the exact position of both planes. This caused the Tupolev to descend too low and to cut the Antonov trajectory. The supervisor in charge of the sector was also blamed insofar he failed to pay sufficient attention to the operations and was unable to identify in time a possible conflict and thus, was unable to initiate any corrective action and to assist his colleague.

Crash of a PZL-Mielec AN-2 in Borogon

Date & Time: Mar 25, 1985 at 1101 LT
Type of aircraft:
Operator:
Registration:
CCCP-44905
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Borogon - Tiksi
MSN:
1G24-05
YOM:
1962
Country:
Region:
Crew on board:
3
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
After completing a cargo flight from Tiksi to Borogon, the crew was returning to Tiksi on a ferry flight. There were no passengers and no cargo on board. After takeoff from Borogon, while climbing to a height of 8 meters at a speed of 120 km/h, the flaps retracted automatically from 30° to zero. The aircraft entered an uncontrolled descent, struck the snow covered ground and crashed 250 meters past the runway end. All three crew members escaped with minor injuries while the aircraft was damaged beyond repair.
Probable cause:
It was determined that the flaps retracted prematurely and accidentally following a short-circuit by the flaps button where electrical resistances were corroded by condensation.

Crash of a Tupolev TU-134AK in Minsk: 58 killed

Date & Time: Feb 1, 1985 at 0801 LT
Type of aircraft:
Operator:
Registration:
CCCP-65910
Flight Phase:
Survivors:
Yes
Schedule:
Minsk - Leningrad
MSN:
63971
YOM:
1982
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
74
Pax fatalities:
Other fatalities:
Total fatalities:
58
Aircraft flight hours:
685
Aircraft flight cycles:
448
Circumstances:
Six seconds after takeoff from runway 13 at Minsk-2 Airport, while climbing to a height of 35 meters and a speed of 325 km/h, the left engine lost power and failed. The crew continued to climb to a height of 220 meters, still at a speed of 325 km/h, when the right engine lost power and failed. The pilot-in-command attempted an emergency landing when the aircraft struck trees and crashed in a wooded area located 10,100 meters from the airport, bursting into flames. The wreckage was found 3 hours and 15 minutes later. 22 people were injured while 58 others were killed, among them three crew members.
Probable cause:
It was determined that the aircraft remained parked on the apron at Minsk-2 Airport for about a week prior to the flight and has not been deiced prior to takeoff. During initial climb, some ice detached from both wings and entered both engines, causing them to flame out.

Crash of a PZL-Mielec AN-2 in Beloye Lake

Date & Time: Jan 24, 1985
Type of aircraft:
Operator:
Registration:
CCCP-19716
Flight Phase:
MSN:
1G165-30
YOM:
1975
Country:
Region:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
For unknown reasons, the crew descended too low when the airplane struck the icy surface of the lake and crashed. Crew fate unknown.

Crash of a Antonov AN-2 near Muya: 3 killed

Date & Time: Jan 23, 1985
Type of aircraft:
Operator:
Registration:
CCCP-35423
Flight Phase:
Survivors:
No
Site:
MSN:
1 125 473 11
YOM:
1960
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
3
Circumstances:
While cruising under VFR mode in IMC conditions, the single engine aircraft struck the slope of a mountain near Muya. All three occupants were killed.
Probable cause:
Controlled flight into terrain.

Crash of a Let L-410UVP in Lineynoye

Date & Time: Dec 29, 1984
Type of aircraft:
Operator:
Registration:
CCCP-67140
Flight Phase:
Survivors:
Yes
MSN:
80 04 06
YOM:
1980
Country:
Region:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
En route, both engines failed due to fuel exhaustion. The crew completed an emergency landing in a prairie near Lineynoye. The aircraft was damaged beyond repair and there were no casualties.
Probable cause:
It was determined that after the fueling process, the crew forgot to properly close the fuel filler cap, causing the fuel to leak during flight.

Crash of a Tupolev TU-154B-2 in Krasnoyarsk: 110 killed

Date & Time: Dec 23, 1984 at 1815 LT
Type of aircraft:
Operator:
Registration:
CCCP-85338
Survivors:
Yes
Schedule:
Krasnoarsk - Irkutsk
MSN:
79A338
YOM:
1979
Flight number:
SU3519
Country:
Region:
Crew on board:
7
Crew fatalities:
Pax on board:
104
Pax fatalities:
Other fatalities:
Total fatalities:
110
Aircraft flight hours:
8955
Aircraft flight cycles:
3581
Circumstances:
After takeoff from Krasnoyarsk-Cheremshanka Airport, while climbing to an altitude of 2,040 meters at a speed of 480 km/h, the right engine (engine n°3) suffered an uncontained failure and caught fire. The crew declared an emergency and was cleared to return for an emergency landing. On final approach, the aircraft banked right then nosed down and crashed at a speed of 425 km/h 3,200 meters short of runway threshold and disintegrated on impact, some 11 seconds prior to landing. A passenger was seriously injured while 110 other occupants were killed.
Probable cause:
It was determined that the failure of the right engine was the consequence of a fatigue failure of the first stage low pressure compressor disk due to metallurgical and manufacture defect. A fire erupted in the right engine and quickly spread to the right wing and the engine n°2 because the crew forgot to close the fuel valve.

Crash of a PZL-Mielec AN-2 in Verkhneimbatskoye

Date & Time: Dec 18, 1984
Type of aircraft:
Operator:
Registration:
CCCP-07861
Flight Phase:
Survivors:
Yes
MSN:
1G170-20
YOM:
1976
Country:
Region:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
At liftoff, the single engine airplane nosed up, stalled and crashed. There were no casualties.
Probable cause:
It was determined that the aircraft was not properly loaded and that the CofG was well beyond the aft limit.

Crash of a Let L-410MA in Kostroma: 10 killed

Date & Time: Dec 4, 1984 at 0813 LT
Type of aircraft:
Operator:
Registration:
CCCP-67225
Flight Phase:
Survivors:
No
Schedule:
Kostroma – Ivanovo – Ulyanovsk
MSN:
77 07 06
YOM:
1977
Flight number:
SU637F
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
8
Pax fatalities:
Other fatalities:
Total fatalities:
10
Aircraft flight hours:
3534
Aircraft flight cycles:
3007
Circumstances:
The twin engine aircraft departed Kostroma Airport at 0809LT on a flight to Ivanovo, carrying eight passengers and two pilots. After takeoff, while climbing in marginal weather conditions, the crew was instructed to report once the altitude of 1,800 meters would be reached but the crew failed to respond. The aircraft entered an uncontrolled descent and crashed in a wooded area located 11 km north of the airport. The aircraft was destroyed and all 10 occupants were killed.
Probable cause:
The exact cause of the accident could not be determined with certainty as investigations were hampered because the aircraft was not equipped with CVR/FDR. Nevertheless, it is believed that the pilot-in-command lost control of the airplane after he suffered a spatial disorientation caused by the malfunction/dysfunction of the horizontal gyro.

Crash of a PZL-Mielec AN-2 in Zaval: 1 killed

Date & Time: Oct 24, 1984
Type of aircraft:
Operator:
Registration:
CCCP-32311
Flight Phase:
Survivors:
Yes
MSN:
1G97-23
YOM:
1968
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
14
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
Shortly after takeoff, while in initial climb, the aircraft nosed up, stalled and crashed. A passenger was killed while 15 other occupants escaped, some of them with minor injuries. At the time of the accident, there was 16 people and 241 kilos of cargo on board.
Probable cause:
It was determined that the crew failed to prepare the flight properly. No weight and balance sheet was computed prior to takeoff and it was determined that the CofG was 5,8% aft the limit.