In connection with the publications linked to the “Flight safety information” document issued by FAVT (Federal Air Transport Agency of Russia) containing data on aircraft accidents during heavy snowfall period in Moscow on 4-5 February, 2018, hereby we inform:
- The mentioned accidents occurred under the circumstances of the severest weather conditions and the unprecedented snowfalls of the 4-5 February, 2018, among incidents and multiple delays of flights performed by aircraft of all types.
- Due to consistent performance of all the SSJ100 systems aimed at maximum passenger safety in case of assumption of the possibility of partial icing of the speed sensors (“the speed indication mismatch” in the FAVT document), the corresponding indicator was activated at the early stage of taxiing or run operation. The system did not allow the aircraft to fly assuring the utmost priority – the safety of the passengers. So, the alert systems of the aircraft DID PERFORM duely.
- The heating of the air data system sensors on SSJ100 is activated automatically when one of the engines starts on ground. Full loss of speed indication for a long time on SSJ100 is impossible due to the aircraft construction. The certification tests performed proved that SSJ100 systems deals and copes with icing successfully.
- During the SSJ100 certification tests the speed sensors were tested under the conditions of the volcano ash cloud occurance. The aircraft passed all these tests and that was confirmed by IAC AR (Russian Aviation Register) and EASA experts.