Mechanical and design problems with the flight control system were among the causes of last year’s Lion Air crash, families of the victims have been told.
Indonesian investigators focused on a system used to improve handling and prevent stalling on the Boeing 737 Max, which crashed killing 189 people.
The 737 Max model was grounded after an Ethiopian Airlines crash in March 2019.
In the meantime, Boeing has replaced the head of its commercial airplanes division as it struggles with a crisis created by two deadly crashes of its newest airliner.
Boeing said that Kevin McAllister is out as chief executive of Boeing Commercial Airplanes.
He is being replaced by Stanley Deal, leader of Boeing’s services division.
The shake-up in Boeing’s top ranks comes just days after the release of internal communications that showed a senior test pilot experienced serious problem while testing flight-control software for the 737 Max on a simulator.
That software, called MCAS, is at the centre of investigations into two crashes that killed 346 people and led to grounding of the Max.
Boeing is taking much longer than executives expected to change the software and get the plane flying again.