Taipei, Taiwan (CNN)The death toll from a TransAsia Airways plane crash rose to 40 on Saturday, authorities said, as details emerged that both engines lost power.
Flight GE235 crashed into a river in Taiwan's capital, Taipei, shortly after takeoff Wednesday with 58 people on board.
Three others remain unaccounted for, while 15 people survived, authorities said.
As crews search for the missing, more revelations emerged on what led to the tragedy.
Pilots grappled with engine problems before the plane clipped a bridge and plunged into a river, Taiwan's aviation safety agency said.
During the crisis in the cockpit, the pilots received a series of alerts, starting with an alarm related to one of the engines and followed by five stall warnings as the plane lost thrust.