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Crash of a Lisunov LI-2T near Yeniseysk: 3 killed

Date & Time: Dec 4, 1952 at 1752 LT
Type of aircraft:
Operator:
Registration:
CCCP-L4661
Flight Phase:
Survivors:
Yes
Schedule:
Dudinka – Yeniseysk – Krasnoyarsk
MSN:
46 01
YOM:
11
Flight number:
SU688
Country:
Region:
Crew on board:
5
Crew fatalities:
Pax on board:
14
Pax fatalities:
Other fatalities:
Total fatalities:
3
Aircraft flight hours:
2670
Circumstances:
The airplane left Yeniseysk Airport at 1655LT bound for Krasnoyarsk. Thirty minutes later, while cruising at an altitude of 1,800 meters by night and in good weather conditions, the crew encountered technical problems with the left propeller that was over speeding. For unknown reason, the crew was unable to feather the propeller and took the decision to return to Yeniseysk. Due to drag, the aircraft lost height and thirty minutes later, at a speed of 130 km/h, it hit tree tops and crashed in a wooded area located 25 km south of Yeniseysk Airport. Three passengers were killed while 16 other occupants were injured. The aircraft was destroyed.
Probable cause:
Failure of the pressure switch on the left-hand drive regulator in flight, which caused the propeller to overspeed. A contributory factor was the crew who failed to set the nominal mode of operation on the right engine immediately after the start of the descent, using full power on the right engine with delay, which caused the aircraft to lose altitude rapidly. Despite good visibility due to moonlight, the crew failed to attempt an emergency belly landing in a suitable terrain.

Crash of a Douglas TS-62 in Skvoritsy: 7 killed

Date & Time: Oct 5, 1952 at 1602 LT
Type of aircraft:
Operator:
Registration:
CCCP-L1055
Flight Phase:
Survivors:
No
Schedule:
Leningrad – Minsk
MSN:
16973/34233
YOM:
1945
Flight number:
SU381
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
7
Aircraft flight hours:
4042
Circumstances:
The TS-62 took off from Leningrad-Shosseynaya Airport and its crew received the permission to climb to the altitude of 2,700 meters via the corridor number two. While climbing into clouds, the airplane collided with an Aeroflot Ilyushin II-12 that was approaching the same Airport. Inbound from Minsk, the II-12 was registered CCCP-L1328 and was carrying 19 passengers and a crew of five. Its pilot obtained the permission from ATC to descend to the altitude of 1,200 meters via the same corridor number two. At the altitude of 1,200 meters, both aircraft collided, dove into the ground and crashed in a field located near the village of Skvoritsy, about 23 km southwest of Leningrad-Shosseynaya Airport. Both wreckage were found 1,200 meters from each other and all 31 occupants were killed.
Probable cause:
It was determined that the collision was caused by an error on part of the ATC services. Despite the fact that both aircraft were tracked on radar screens, ATC based at Leningrad-Shosseïnaya Airport failed to take appropriate actions to ensure a minimum safe separation between both airplanes and failed to realize that they were flying in the same corridor in an opposite direction and at the same altitude. Investigations revealed that the collision was the result of successive errors on part of the ATC who failed to ensure an efficient radar surveillance and transmitted to both crews inappropriate instructions that led both aircraft on the same track.

Crash of an Ilyushin II-12 in Skvoritsy: 24 killed

Date & Time: Oct 5, 1952 at 1602 LT
Type of aircraft:
Operator:
Registration:
CCCP-L1328
Survivors:
No
Schedule:
Minsk – Leningrad
MSN:
30 054
YOM:
30
Flight number:
SU376
Country:
Region:
Crew on board:
5
Crew fatalities:
Pax on board:
19
Pax fatalities:
Other fatalities:
Total fatalities:
24
Aircraft flight hours:
2283
Circumstances:
The crew was approaching Leningrad-Shosseynaya Airport and obtained the permission by ATC to descend to the altitude of 1,200 meters via corridor number two. While flying into clouds, the airplane collided with an Aeroflot Douglas TS-62 registered CCCP-L1055 that was performing flight SU381 to Minsk with seven people on board. It just took off from the same airport and its crew received the permission to climb to the altitude of 2,700 meters via the same corridor number two. At the altitude of 1,200 meters, both aircraft collided, dove into the ground and crashed in a field located near the village of Skvoritsy, about 23 km southwest of Leningrad-Shosseynaya Airport. Both wreckage were found 1,200 meters from each other and all 31 occupants were killed.
Probable cause:
It was determined that the collision was caused by an error on part of the ATC services. Despite the fact that both aircraft were tracked on radar screens, ATC based at Leningrad-Shosseïnaya Airport failed to take appropriate actions to ensure a minimum safe separation between both airplanes and failed to realize that they were flying in the same corridor in an opposite direction and at the same altitude. Investigations revealed that the collision was the result of successive errors on part of the ATC who failed to ensure an efficient radar surveillance and transmitted to both crews inappropriate instructions that led both aircraft on the same track.

Crash of a Lisunov LI-2 near Belogorsk: 7 killed

Date & Time: Sep 28, 1952
Type of aircraft:
Operator:
Registration:
CCCP-L4673
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Khabarovsk – Krasnoyarsk – Novosibirsk – Tashkent
MSN:
66 05
YOM:
1949
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
7
Circumstances:
The aircraft was completing a flight from Khabarovsk to Tashkent with intermediate stops in Krasnoyarsk and Novosibirsk, carrying a crew of six and one passenger, a Soviet Army Officer. The airplane left Krasnoyarsk Airport at 1822LT bound for Novosibirsk. En route, the crew encountered poor weather conditions with low clouds and rain falls. While cruising at an altitude of 1,500 meters in the clouds, the crew encountered icing conditions and obtained the permission to descend to 900 meters. As the aircraft failed to arrive in Novosibirsk, SAR operations were conducted but eventually suspended few days later as no trace of the aircraft nor the seven occupants was found. The wreckage was found 15 years later, in 1967, on the northwestern slope of Mt Kuznetsky Alatau (1,037 meters high) located in the region of Belogorsk. According to investigations, it appears the aircraft hit tree tops, flew about 70 meters and crashed in flames in a wooded area at an altitude of 710 meters. The airplane disintegrated on impact and was consumed by a post crash fire. All seven occupants were killed.
Probable cause:
It is believed that the accident occurred when the crew was attempting an emergency landing due to severe icing conditions.

Crash of a Lisunov LI-2 in Riga: 4 killed

Date & Time: Jul 19, 1952 at 2302 LT
Type of aircraft:
Operator:
Registration:
CCCP-L4197
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Riga - Riga
MSN:
184 207 02
YOM:
1945
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
4
Aircraft flight hours:
5948
Circumstances:
The crew was performing a local night training flight at Riga-Spilve Airport. On final approach, the instructor asked the pilot-in-command to make a go around. The aircraft climbed to a height of about 60 meters and then turn to the left, stalled and crashed 250 meters from the tower. All 4 crew members were killed.
Probable cause:
The exact cause of the accident could not be determined with certainty. However, it is reported that both engines flamed out during the initial climb, probably following a mishandling of the fuel management system on part of the flying crew. At the time of the accident, the connected fuel tank has 54 liters fuel only, which was considered as insufficient.

Crash of a Lisunov LI-2 near Khandyga: 4 killed

Date & Time: May 3, 1952 at 0814 LT
Type of aircraft:
Operator:
Registration:
CCCP-L4602
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Yakutsk – Khandyga – Allaikha
MSN:
46 07
YOM:
0
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
4
Aircraft flight hours:
2284
Circumstances:
On the leg from Yakutsk to Khandyga of a cargo flight from Yakutsk to Allaikha when the favorable weather forecast turned out not to be in line with reality. The aircraft deviated from the prescribed flight path due to strong winds, entered clouds and crashed at a height of some 1,200 metres into the northwestern slope of the first mountain of the Verkhoyanski khrebet ridge located some 95 km northwest of Khandyga and fell down into a ravine about 120 meters further on. All 4 crew were killed. The wreckage was found eight days later, on 11 of May.
Probable cause:
The weather report transmitted to the crew before departure did not reflect the reality and the weather conditions were worse than predicted. Nevertheless, the crew failed to demonstrate discipline and mismanaged the flight properly and according to the published procedures.

Crash of an Ilyushin II-12 in Novosibirsk: 8 killed

Date & Time: Apr 25, 1952
Type of aircraft:
Operator:
Registration:
CCCP-L1312
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Novosibirsk - Novosibirsk
MSN:
30018
YOM:
14
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
8
Aircraft flight hours:
1923
Circumstances:
The crew left Novosibirsk-Severny Airport at 1400LT for a local training flight. At that time, weather conditions were poor with overcast at 200 meters, rain showers, visibility less than three km and icing conditions in clouds. While flying into the clouds at an altitude estimated between 1,200 and 1,250 meters with the left engine inoperative, the pilot-in-command lost control of the airplane that turned to the left, dove into the ground and crashed in flames few km from the airport. A crew member was injured while eight other occupants were killed.
Probable cause:
The exact cause of the accident could not be determined with certainty. However, it was reported that the left engine was inoperative at impact and that the propeller was feathered, a configuration apparently intended by the crew and part of the training program.

Crash of a Ilyushin II-12 in Magdagachi: 6 killed

Date & Time: Apr 5, 1952 at 1339 LT
Type of aircraft:
Operator:
Registration:
CCCP-L1308
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Irkutsk – Chita – Magdagachi – Khabarovsk
MSN:
30014
YOM:
12
Flight number:
SU005
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
6
Aircraft flight hours:
1890
Circumstances:
The crew was performing a cargo flight from Irkutsk to Khabarovsk with intermediate stops in Chita and Magdagachi, carrying a load of 2,090 kilos of various goods and mail. After a takeoff run of about 600 meters, the pilot-in-command completed the rotation and the aircraft climbed to a height of 30-40 meters when it banked right to an angle of 10-15° then up to 70°. Out of control, it plunged into the earth and crashed in a huge explosion in a field located 922 meters to the right of the extended center line, about 800 meters past the runway end. The aircraft was destroyed by impact forces and a post crash fire and all 6 crew members were killed.
Probable cause:
The exact cause of the accident could not be determined with certainty. However, the assumption that a technical issue or a wrong position of the left ailerons is not ruled out. At the time of the accident, strong crosswinds and turbulence were present at the airport and may be considered as a contributory factor.

Crash of an airplane in Tula: 36 killed

Date & Time: Mar 26, 1952
Type of aircraft:
Operator:
Survivors:
No
Schedule:
Odessa – Toula – Moscow
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
32
Pax fatalities:
Other fatalities:
Total fatalities:
36
Circumstances:
On landing at Tula Airport, the Aeroflot's airplane went out of control, veered off runway and collided with a Soviet Air Force aircraft that was holding for takeoff to Berlin. Both aircraft exploded and all 70 occupants on both aircraft were killed, 36 on board Aeroflot and 34 on board the Soviet Air Force airplane, among them 30 Army cadets. The exact circumstances of this ground collision remains unclear.

Crash of a Lisunov LI-2 in Stalingrad: 3 killed

Date & Time: Jan 9, 1952 at 0222 LT
Type of aircraft:
Operator:
Registration:
CCCP-L4315
Flight Type:
Survivors:
Yes
Schedule:
Moscow – Voronezh – Stalingrad – Baku
MSN:
184 274 10
YOM:
29
Flight number:
SU203
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
3
Aircraft flight hours:
4736
Circumstances:
The crew was performing a cargo flight from Moscow to Baku with intermediate stops in Voronezh and Stalingrad, carrying a load of 1,793 kilos of various goods consisting of 517 kilos of brass sheets and mail. The approach to Stalingrad Airport was completed by night and marginal weather conditions. On final, while at a height of about 250 meters some 2,300 meters short of runway, the aircraft lost altitude and then stalled and crashed in a snow covered field, about 60 meters to the right of the center line. The aircraft broke in two and the radio operator was seriously injured while three other occupants were killed.
Probable cause:
It was determined that the young copilot was seated on the left seat while the captain was seated on the right seat at the time of the accident, which was against all regulations and company procedures as the captain did not have sufficient experience to complete a night approach in such configuration. Investigations revealed that the stall was caused by an insufficient approach speed due to an inadequate approach configuration on part of the crew who failed to monitor their instruments properly, especially the speed indicator. The following factors were considered as contributory:
- Lack of coordination during final approach,
- Negligence,
- Lack of discipline,
- Wrong approach configuration,
- Poor flight preparation.