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

Date & Time: Dec 4, 1984 at 0813 LT
Type of aircraft:
Let L-410
Operator:
Registration:
CCCP-67225
Flight Phase:
Takeoff (climb)
Flight Type:
Scheduled Revenue Flight
Survivors:
No
Site:
Plain, Valley
Schedule:
Kostroma – Ivanovo – Ulyanovsk
MSN:
77 07 06
YOM:
1977
Flight number:
SU637F
Location:
Kostroma
Kostroma oblast
Country:
Russia
Region:
Asia
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 an Antonov AN-12 in Ivanovo

Date & Time: Nov 16, 1982 at 1200 LT
Type of aircraft:
Antonov AN-12
Operator:
Flight Phase:
Takeoff (climb)
Flight Type:
Military
Site:
Airport (less than 10 km from airport)
Location:
Ivanovo
Ivanovo oblast
Country:
Russia
Region:
Asia
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Shortly after takeoff from Ivanovo Airport, while climbing in poor weather conditions, the pilot-in-command lost control of the airplane that stalled and crashed in a field. The crew fate remains unknown while the aircraft was destroyed.
Probable cause:
It was determined that the loss of control occurred during initial climb in poor visibility due to bad weather when the crew failed to prepare the flight according to published procedures and forgot to trigger the artificial horizon.

Crash of a PZL-Mielec AN-2 in Degtyarnovo: 4 killed

Date & Time: Jul 28, 1976 at 1748 LT
Type of aircraft:
PZL-Mielec AN-2
Operator:
Registration:
CCCP-35088
Flight Phase:
Flight
Flight Type:
Ferry
Survivors:
No
Site:
Plain, Valley
Schedule:
Sokolsky - Ivanovo
MSN:
1G112-04
YOM:
1969
Location:
Degtyarnovo
Ivanovo oblast
Country:
Russia
Region:
Asia
Crew on board:
3
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
4
Aircraft flight hours:
4695
Aircraft flight cycles:
14777
Circumstances:
During the day, the crew completed crop spraying missions for the sovkhoz of 'Garsky' located in the region of Sokolsky. At 1713LT, the airplane departed Sokolsky on a ferry flight to Ivanovo with three crew members and one unauthorized passenger on board. While cruising at a relative low altitude, the single engine airplane went out of control and crashed in flames in a wooded area located 2 km northwest of Degtyarnovo. The burnt wreckage was found in the evening and all four occupants have been killed.
Probable cause:
It was determined that all four occupants (both pilots, the mechanic and the passenger) were intoxicated at the time of the accident. The crew decided to embark a passenger at Sokolsky without prior permission and all of them consumed alcohol during all day and prior to departure. A lack of discipline, a high alcohol level in blood and a total distraction caused the pilot to lose control of the aircraft. The alcohol level was 5,4‰ by the captain, 2‰ by the copilot, 4,4‰ by the mechanic and 2,5‰ by the passenger.

Crash of a GVF PS-84 near Ivanovo: 5 killed

Date & Time: Jun 3, 1943 at 1315 LT
Type of aircraft:
GVF PS-84
Operator:
Registration:
CCCP-L3932
Flight Phase:
Flight
Flight Type:
Cargo
Survivors:
Yes
Site:
Plain, Valley
Schedule:
Moscow-Chkalovski – Vologda – Belomorsk
MSN:
184 14 10
YOM:
1941
Location:
Ivanovo
Ivanovo oblast
Country:
Russia
Region:
Asia
Crew on board:
5
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
5
Aircraft flight hours:
1864
Circumstances:
The crew was performing a cargo flight from Moscow-Chkalovski to Belomorsk with an intermediate stop in Vologda. About 35 minutes after takeoff, while cruising at an altitude of 200-250 meters, the right engine lost power and stopped. Shortly later, the left engine also failed. The Captain attempted to make an emergency landing when the aircraft hit tree tops and crashed in flames in a wooded area. Four crew members and one passenger were killed while three other occupants were injured. The aircraft was destroyed.
Probable cause:
The flight mechanic forgot to switch the tanks in time sot the fuel pressure dropped, causing the right engine to fail, soon followed by the left one.
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