Incident Sukhoi Superjet 100-95B RA-89120,
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ASN Wikibase Occurrence # 269118
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Date:Thursday 21 October 2021
Time:11:33 UTC
Type:Silhouette image of generic SU95 model; specific model in this crash may look slightly different    
Sukhoi Superjet 100-95B
Owner/operator:Azimuth Airlines
Registration: RA-89120
MSN: 95174
Fatalities:Fatalities: 0 / Occupants:
Aircraft damage: None
Location:near Tikhoretsk -   Russia
Phase: En route
Nature:Passenger - Scheduled
Departure airport:Adler/Sochi Airport (AER/URSS)
Destination airport:Bryansk International Airport (BZK/UUBP)
Confidence Rating: Information is only available from news, social media or unofficial sources
Azimuth Airlines flight A4543, a Sukhoi Superjet 100-95B, was flying en route at FL340 (10350m) when it began an unauthorized climb.
The flight crew had noticed a loss of the signal from satellite navigation systems, which was a frequent occurrence in that area. The captain began to try to delete these messages, but inadvertently pushed the the emergency landing gear release button instead of the error reset button.
The aircraft was flying at an indicated speed of 270 knots, which was higher than the maximum speed for landing gear release (255 knots). After the undercarriage had deployed the autopilot reacted to the increased drag by trimming the stabilizer and adding power.
At that moment another aircraft, Azur Air flight 493 (Boeing 737-8Q8 VQ-BAL), was flying in the opposite direction at flight level FL350 (10650m). At 14.33 there was a Short Term Conflict Alert (STCA) when flight 543 crossed FL344 (10363m).
The flight crew reported an uncommanded landing gear release to ATC, and requested a descent to FL290 (8850m).
The captain decided to divert to Rostov-on-Don Airport. A safe landing was made at 15.04.


Revision history:

22-Oct-2021 18:23 harro Added
20-Nov-2021 08:11 harro Updated [Date, Source, Narrative]

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