Shortly before the crash of a Boeing 737 Max in Ethiopia, the automatic trim system MCAS should have been in use. This is according to a report in the Wall Street Journal to a provisional final report of the US investigators. Also in the crash of a Lion Air in Indonesia MCAS to have played a role. According to the report, it is the most significant indication that a malfunction in the trim system was for the crashes in Ethiopia and Indonesia. You throw the aircraft manufacturer to have not enough information about the risks of the MCAS system informed.

Source: Ethiopian News March 29, 2019 13:07 UTC