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Crash of a Tupolev TU-154M in Novgorodskoye: 170 killed

Date & Time: Aug 22, 2006 at 1539 LT
Type of aircraft:
Operator:
Registration:
RA-85185
Flight Phase:
Survivors:
No
Schedule:
Anapa - Saint Petersburg
MSN:
91A-894
YOM:
1991
Flight number:
FV612
Country:
Region:
Crew on board:
10
Crew fatalities:
Pax on board:
160
Pax fatalities:
Other fatalities:
Total fatalities:
170
Aircraft flight hours:
24215
Circumstances:
The aircraft departed Anapa Airport at 1505LT and climbed to the assigned altitude of 11,700 metres. Due to the presence of stormy weather ahead, the crew was cleared to modify his route and changed heading to avoid the thunderstorm area with CB's up to 15 km. The aircraft encountered severe turbulences and climbed from 11,961 metres to 12,794 metres within 10 seconds, reaching a super critical angle of attack of 46° with a speed dropping from 350 km/h to zero, causing all three engines to stop. The crew was able to send a brief message then the aircraft entered an uncontrolled descent in a flat spin. At an altitude of 3,300 metres, the crew informed ATC that control was totally lost. The aircraft crashed in a prairie located near Novgorodskoye, about 45 km northwest of Donetsk. It was totally destroyed by impact forces and a post crash fire, and all 170 occupants were killed.
Probable cause:
The cause of the accident was a loss of control in manual flight mode after the aircraft reached a super critical angle of attack, causing a stall with the subsequent transition to a flat spin and collision with the ground with a large vertical velocity. The following contributing factors were identified:
- Poor crew coordination,
- Failure of the crew to follow the flight manual instructions to identify and prevent a stall condition,
- The crew training methods used were insufficient to demonstrate the dangers of manual flight at high altitudes.
Final Report:

Crash of an Ilyushin II-86 in Moscow: 14 killed

Date & Time: Jul 28, 2002 at 1525 LT
Type of aircraft:
Operator:
Registration:
RA-86060
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Moscow - Saint-Petersburg
MSN:
51483203027
YOM:
1983
Country:
Region:
Crew on board:
16
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
14
Aircraft flight hours:
18363
Circumstances:
The aircraft was leaving Moscow on a ferry flight to St Petersburg following a charter flight from Sochi. On board were 16 crew members, among them 10 employees of the company. Two seconds after takeoff from runway 07L, while climbing to a height of about 200 metres, the stabilizers trimmed to the full up position of 12°. The aircraft nosed up and reached a super critical angle of attack. The crew attempted to regain control by pushing the control column forward but the aircraft stalled and crashed in a huge explosion about 700 metres past the runway end. Two stewardesses were injured while 14 other occupants were killed.
Probable cause:
The cause could not be determined with certainty due to the almost complete destruction of the main and reserve stabilizer control system units as a result of the fire on the ground and lack of information on the primary and backup stabilizer control systems on the flight data recorder, and the lack of crew comments on the cockpit voice recorder. The accident of IL-86 RA-86060 could be caused by an electrical failure in the stabilizer control system, which led to the reverse control response when controlling the stabilizer from the main system or inadequate actions of one of the pilots, expressed in pressing and holding the "pitch up" stabilizer switch on the control column.