Selon un journal taïwanais, pendant le roulage les pilotes ont remarqué une panne du ATPCS (Automatic Take-off Power Control System) système expliqué au cours de ce topic. Ils ont décidé de poursuivre le vol, pendant la phase de décollage cette panne a mis en drapeau l'hélice du moteur 2, mais le Captain a coupé ensuite l'autre moteur, conduisant à la perte de contrôle que l'on connait.
Citation:
(...) A malfunction in the plane's No. 2 engine Automatic Take-off Power Control System (ATPCS) was found by both pilots when the ATR72-600 was taxiing, but the flight was not suspended as it should have been, said ASC Managing Director Thomas Wang (???). According to the cockpit voice recorder (CVR), the co-pilot said: "No ATPCS armed" at 10:51:43 a.m., to which the pilot replied: "Ok. Continue takeoff." While TransAsia Airways' standard operating procedure stipulates that whenever an ATR72-500 aircraft encounters problems during takeoff, the pilots have the authority to re-evaluate certain variables, including take-off weight, to decide whether to continue with the flight, the carrier does not have any such guidelines for the ATR72-600, Wang said. TransAsia Airways flight instructors, however, told the ASC during the investigations that the flight should not have been allowed to take off, Wang said. The ATPCS glitch led to the auto-feathering of No. 2 engine, which triggered a power loss. Instead of shutting down the non-functioning engine, however, both pilots mistakenly pulled back the throttle for the other engine, which was working normally at the time, causing the crash, according to the CVR. (...)
http://www.taiwannews.com.tw/etn/news_c ... id=2763968