Jakarta (AFP)

Defects in the design of the Boeing 737 Max flight control system played a key role during the Lion Air aircraft crash off Indonesia, which killed 189 people on October 28, 2018. said Friday Indonesian investigators.

"The design and certification of the MCAS," an automatic system that was supposed to prevent the aircraft from going into a dive, "were unsuitable," said the national committee responsible for transport safety in a report released Friday in Jakarta.

A few months after the crash, an Ethiopian aircraft of the same model, which served as the link between Addis Ababa and Nairobi, also crashed, killing 157 people.

All 737 MAXs have since been nailed to the ground.

A committee of the World Civil Aviation Authorities (JATR) recently found that the US Federal Aviation Agency (FAA) failed to properly assess the MCAS because it lacked engineers and expertise .

Boeing announced Tuesday the dismissal of its Commercial Aviation Division (BCA) chief, Kevin McAllister, the first executive since the onset of the crisis.

© 2019 AFP