The aircraft skidded off the runway 32 seconds after landing at an air speed of about 116 kn (134 mph). In the process of skidding off, at the command of the captain, the flight engineer switched off the engines by means of the emergency shut down. The plane continued to roll out of the runway, slowly decelerating due to road bumps and snow cover. At this point, both landing gear struts were compressed, which led to the activation of airbrakes and spoilers. The plane collided with the slope of a ravine at a ground speed of about 100 ktns (120 mph)
Contributing factors to the crash are:
Contributing factors to the crash are:
1) Stiffness of the reverse thrust control and locking mechanism that can manifest itself only during improper reverse thrust control by the crew and that is not mentioned in the maintenance manual section covering adjustments after engine change.
2) Contradictions between the aircraft and engine maintenance manuals and a continuous neglectful attitude to engine control system checks and adjustments (including the reverser control and locking mechanism) by organizations responsible for engine replacement, making it impossible for aircraft and engine developers to receive feedback and correct flaws.
3) Failure of spoilers and speed brakes automatic deployment due to absence of the simultaneous both main gear Weight-On-Wheels signal caused by initial 'soft' left wheel touchdown (1.12g) in extreme conditions of 11.5 m/s right crosswind.
4) Failure of flight crew to verify the automatic spoilers and speed brakes deployment after touchdown and to deploy them manually.
Aircraft Information
Airline: Red Wings Airlines
Code: WZ/RWZ
2) Contradictions between the aircraft and engine maintenance manuals and a continuous neglectful attitude to engine control system checks and adjustments (including the reverser control and locking mechanism) by organizations responsible for engine replacement, making it impossible for aircraft and engine developers to receive feedback and correct flaws.
3) Failure of spoilers and speed brakes automatic deployment due to absence of the simultaneous both main gear Weight-On-Wheels signal caused by initial 'soft' left wheel touchdown (1.12g) in extreme conditions of 11.5 m/s right crosswind.
4) Failure of flight crew to verify the automatic spoilers and speed brakes deployment after touchdown and to deploy them manually.
Aircraft Information
Airline: Red Wings Airlines
Code: WZ/RWZ
Aircraft: Tupolev Tu-204-100
Registration: RA64047
Serial Number: 1450744864047
Engines: Soloviev PS-90A
First Flew: 2008
Age: 5.1 Years
Registration: RA64047
Serial Number: 1450744864047
Engines: Soloviev PS-90A
First Flew: 2008
Age: 5.1 Years
No comments:
Post a Comment