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Transasia Airways Flight 235

arshad

By arshad
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arshad LEGEND

arshad

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https://www.youtube.com/watch?v=U5yb0awcSDM

 

https://www.youtube.com/watch?v=gwAoqo9wypc

 

https://www.youtube.com/watch?v=RUQWJai59lo

 

Investigation

The Taiwanese Aviation Safety Council (ASC) is leading the investigation into the accident.[4][19] The French BEA was invited to represent the country of manufacture, and the Transportation Safety Board of Canada will represent the country of engine manufacture. Other parties to the investigation include the Taiwanese Civil Aeronautics Administration, the operator (TransAsia), the aircraft (ATR) and engine (PWC) manufacturers, and Transport Canada.[20] The cockpit voice recorder and flight data recorder were recovered in the evening of 4 February, and the data were being analysed.[2] According to the executive director of the ASC, Thomas Wang, the aircraft's right engine triggered an alarm just 37 seconds after takeoff.[21] Whereas the crew reported aflameout,[22] according to Wang, data showed one of the engines had in fact been moved into idle mode.[21] Soon the right engine failed to produce enough thrust for its rotating propeller, lapsing into auto-feathering.[22] A restart was attempted, but the aircraft crashed 72 seconds later.[21]

On 6 February, investigators revealed that the left engine, which does not appear to have had suffered a malfunction, had been manually shut off,[23] while cautioning that it was "too early to say if human error was a factor".[16] Investigators released the following preliminary sequence of events. All times are local (UTC+8).[20][24]

  • 10:51:13 — Crew receives take-off clearance
  • 10:52:34 — Tower asks crew to contact Taipei Departure
  • 10:52:38 — Right engine failure alert; master warning sounds for 3s
  • 10:53:04 — Crew reduces power to the left engine
  • 10:53:12–18 — Stall warning sounds
  • 10:53:24 — Crew cuts power to the left engine
  • 10:53:34 — Crew declares emergency: "Mayday, mayday, engine flameout"
  • 10:54:09 — Crew calls for restarting the left engine multiple times
  • 10:54:20 — Left engine is restarted
  • 10:54:34 — Master warning sounds again
  • 10:54:35 — An unidentified sound is heard
  • 10:54:36 — Recordings end

The ASC issued an interim report on 2 July. Without assigning responsibility for the crash, the report confirmed that after the failure of one engine the pilot pulled back the wrong throttle, shutting down the other, working engine. It also said that the pilot in command, Liao Chien-tsung, failed simulator training in May 2014. The ASC is expected to publish its final report in April 2016, with a draft version in November 2015.[25]

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