Zone
Crash of a Tupolev TU-124V in Vinniki: 17 killed
Date & Time:
Dec 23, 1973 at 2208 LT
Operator:
Registration:
CCCP-45044
Survivors:
No
Schedule:
Lviv - Kiev - Kuybyshev
MSN:
3351104
YOM:
1963
Flight number:
SU5398
Crew on board:
6
Crew fatalities:
Pax on board:
11
Pax fatalities:
Other fatalities:
Total fatalities:
17
Aircraft flight hours:
13476
Aircraft flight cycles:
10942
Circumstances:
Following a night takeoff from Lviv-Snilow Airport, while climbing, the crew encountered a major technical failure on the left engine that caught fire. The airplane went out of control and crashed in a huge explosion in Vinniki, about 12 km east of the airfield. The aircraft disintegrated on impact and all 17 occupants have been killed.
Probable cause:
It was determined that a turbine blade located on the 1st stage of the high pressure turbine of the left engine broke off shortly after rotation, due to conception failure. Analyses revealed that the turbine blade that failed had not been the subject of a standard thermic treatment, which had the effect of reducing its resistance and its hardness that was lower than the requirements of the technical specifications. Investigators stated that the turbine blade failure caused a sudden loss of power of the left engine and several debris smashed in the turbine chamber, resulting in the rupture of a fuel line. Under pressure, the fuel leaked into the chamber and ignited while contacting various elements whose temperature was high. Under such circumstances, the flight crew was unable to maintain an adequate control of the aircraft.
Crash of an Ilyushin II-12 in Minsk: 8 killed
Date & Time:
Jul 21, 1960 at 0032 LT
Operator:
Registration:
CCCP-01405
Survivors:
Yes
Schedule:
Leningrad – Vilnius – Minsk – Lviv
MSN:
83012902
YOM:
1949
Flight number:
SU414
Crew on board:
4
Crew fatalities:
Pax on board:
24
Pax fatalities:
Other fatalities:
Total fatalities:
8
Aircraft flight hours:
13706
Circumstances:
After a course of 750 meters at Minsk Airport, the pilot-in-command completed the rotation. Due to an insufficient speed, the airplane climbed with a high angle off attack and was quite immediately in a nose high attitude and in stall conditions. The airplane struck the ground four times then hit power cables before crashing on a truck parking lot. The aircraft was destroyed and all four crew members and four passengers were killed. The rest of the occupants were injured.
Probable cause:
Wrong takeoff configuration on part of the flying crew who started the rotation at an insufficient speed, causing the aircraft to be in a high angle of attack and in stall conditions immediately after liftoff. The fact that the runway was soggy was considered as a contributing factor because this slow down the airplane during the takeoff procedure to due an excessive accumulation of water on the lower part of the wing, reducing the aerodynamic capabilities.
Crash of an Antonov AN-10A in Lviv: 32 killed
Date & Time:
Feb 26, 1960 at 1657 LT
Operator:
Registration:
CCCP-11180
Survivors:
Yes
Schedule:
Moscow – Kiev – Lviv
MSN:
9 4 018 01
YOM:
30
Flight number:
SU315
Crew on board:
8
Crew fatalities:
Pax on board:
25
Pax fatalities:
Other fatalities:
Total fatalities:
32
Aircraft flight hours:
109
Circumstances:
On final approach to Lviv-Snilow Airport in icing conditions, at an altitude of 100 meters, the crew deployed the flaps at 45° when the aircraft stalled and crashed in a swampy area located short of runway threshold. A passenger was seriously injured while 32 other occupants were killed. Excessive ice accumulation on stabs caused the airplane to be unstable and to stall.
Probable cause:
Investigations were able to determine that the cause of the accident was an excessive deployment of flaps during an approach completed in icing conditions. The combination of icing conditions (excessive ice accumulation on stabs) and excessive flaps deployment caused the aircraft to stall. Following this accident, Antonov will provide an update of the flight manuals with a modification of the approach procedures, limiting the flaps deployment to an angle of 15° in icing conditions. Investigations conducted about this accident will be able to determine the cause of a similar accident that occurred at Lviv Airport on 16NOV1959, causing the crash of the same type of aircraft in identical conditions.
Crash of an Antonov AN-10 in Lviv: 40 killed
Date & Time:
Nov 16, 1959 at 1906 LT
Operator:
Registration:
CCCP-11167
Survivors:
No
Schedule:
Moscou – Kiev – Lvov
MSN:
9 4 014 02
YOM:
5
Flight number:
SU315
Crew on board:
8
Crew fatalities:
Pax on board:
32
Pax fatalities:
Other fatalities:
Total fatalities:
40
Aircraft flight hours:
277
Circumstances:
The approach to Lviv Airport was completed by night and icing conditions with limited visibility. On final, while at an altitude of 110 meters, when the flaps were downed to 45°, the airplane nosed down and crashed in a huge explosion in a field located 2,100 meters short of runway threshold. The airplane disintegrated on impact and all 40 occupants were killed.
Probable cause:
Loss of control in icing conditions when the flaps were downed to 45° on approach, apparently due to an excessive accumulation of ice on wings and stabs. The distance between the aircraft and the ground was insufficient to expect a recovery.
Crash of an Ilyushin II-14D in Lviv: 7 killed
Date & Time:
Aug 30, 1957 at 0759 LT
Operator:
Registration:
CCCP-L1440
Survivors:
No
Schedule:
Lviv – Kiev – Moscow
MSN:
1470 015 12
YOM:
15
Crew on board:
5
Crew fatalities:
Pax on board:
2
Pax fatalities:
Other fatalities:
Total fatalities:
7
Aircraft flight hours:
122
Circumstances:
For unknown reason, the crew decided to start the flight under VFR in IMC conditions. At the time of the accident, weather conditions were as follow: overcast between 100 and 200 meters, mist and a visibility estimated between 2 and 4 km. The crew departed at 0750LT on a cargo flight to Moscow via Kiev but lost almost immediately his sens of orientation while cruising southbound at an altitude of 150 meters. The pilot-in-command elected to return when the aircraft crashed on a wooded hill located 7,5 km south of the airport. All seven occupants were killed.
Probable cause:
Loss of control while flying under VFR in IMC conditions.
Crash of a Lockheed 10A Electra in Susiec: 3 killed
Date & Time:
Dec 28, 1936 at 1045 LT
Operator:
Registration:
SP-AYA
Survivors:
Yes
Schedule:
Lviv - Warsaw
MSN:
1045
YOM:
1936
Crew on board:
2
Crew fatalities:
Pax on board:
10
Pax fatalities:
Other fatalities:
Total fatalities:
3
Circumstances:
En route from Lviv to Warsaw, the crew encountered poor weather conditions with severe icing conditions. The captain decided to attempt an emergency landing when the aircraft crash landed in a field located near Susiec. Two passengers were killed while the radio operator died the following day from his injuries. All nine other occupants were injured. The aircraft was damaged beyond repair.
Crew:
Mieczysław Jonikas, pilot,
Józef Fronc, radio operator. †
Passengers:
Józef Zimmerman, †
Zygmunt Łoś, †
Tadeusz Piszczkowski +7
Crew:
Mieczysław Jonikas, pilot,
Józef Fronc, radio operator. †
Passengers:
Józef Zimmerman, †
Zygmunt Łoś, †
Tadeusz Piszczkowski +7
Probable cause:
Icing.
