Azimuth SU95 near Rostov on Oct 21st 2021, accidental gear extension enroute causes loss of separation

Last Update: November 11, 2021 / 19:28:44 GMT/Zulu time

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Incident Facts

Date of incident
Oct 21, 2021

Classification
Incident

Flight number
A4-543

Departure
Sochi, Russia

Destination
Bryansk, Russia

Aircraft Registration
RA-89120

ICAO Type Designator
SU95

An Azimuth Airlines Sukhoi Superjet 100-95, registration RA-89120 performing flight A4-543 from Sochi to Bryansk (Russia), was enroute at FL340 about 90nm south of Rostov on Don (Russia) when the crew dealt with repeated messages of lost signal from the satellite navigation system. The captain wanted to cancel the message on FMS and engine and warning display (EWD) the captain mistakenly pressed the alternate gear extension button. The gear extended at 270 KIAS (permitted below 255 KIAS), which caused the autopilot, still engaged, to climb the aircraft by about 450 feet before descending again. The crew requested a descent to FL290 and a diversion to Rostov, where the aircraft landed safely about 35 minutes later.

Rosaviatsia reported another aircraft was enroute at FL350 in opposite direction causing the Short Term Collision Warning to activate at the controller's desk at the SU95 climbed through FL344. The SU95 landed safely and did not receive any damage.

The occurrence aircraft remained on the ground for about 18 hours before returning to service.
Aircraft Registration Data
Registration mark
RA-89120
Country of Registration
Russia
Date of Registration
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Certification Basis
Manufacturer
Aircraft Model / Type
RRJ-95B-100
ICAO Aircraft Type
SU95
Serial Number
Engine Count
Incident Facts

Date of incident
Oct 21, 2021

Classification
Incident

Flight number
A4-543

Departure
Sochi, Russia

Destination
Bryansk, Russia

Aircraft Registration
RA-89120

ICAO Type Designator
SU95

This article is published under license from Avherald.com. © of text by Avherald.com.
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