A pilot shut down the only working engine of a TransAsia Airways Corp. flight before the plane crashed in Taipei City earlier this year killing 43 people, Taiwan’s aviation authority said Thursday.

According to the Aviation Safety Council, a transcript of the cockpit voice recording of TransAsia Flight GE235 on Feb. 4 features one of the two pilots shouting “Wow, pulled back the wrong side throttle”, apparently realizing that the wrong engine had been shut down after the other had failed shortly after take off.

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