Final report has been released today:
Final report of the Committee for Investigation of National Aviation Accidents into the causes and circumstances of the Tu-154M plane crash (tail number 101) in Smolensk
On 29 July 2011 the Committee for Investigation of National Aviation Accidents presented the final report into the causes and circumstances of the Tu-154M plane crash (tail number 101) in Smoleńsk.
The immediate cause of the accident was the descent below the minimum descent
altitude at an excessive rate of descent in weather conditions which prevented visual contact
with the ground, as well as a delayed execution of the go-around procedure. Those
circumstances led to an impact on a terrain obstacle resulting in separation of a part of the left
wing with aileron and consequently to the loss of aircraft control and eventual ground impact.
Circumstances Contributing to the Accident
1) Failure to monitor altitude by means of a pressure altimeter during a non-precision
2) Failure by the crew to respond to the PULL UP warning generated by the TAWS;
3) Attempt to execute the go-around maneuver under the control of ABSU (automatic goaround);
4) Approach Control confirming to the crew the correct position of the airplane in
relation to the RWY threshold, glide slope, and course which might have affirmed the
crew's belief that the approach was proceeding correctly although the airplane was
actually outside the permissible deviation margin;
5) Failure by LZC to inform the crew about descending below the glide slope and delayed
issuance of the level-out command;
6) Incorrect training of the Tu-154M flight crews in the 36 Regiment.
[Edited 2011-07-29 01:59:48]