This 18 June 2020 video from the United States Senate says about itself:
Lawmakers rip FAA for not disclosing documents on Boeing 737 MAX
Translated from Dutch NOS radio today:
‘Boeing did not report crucial modification of 737 MAX to aviation authority’
US American aircraft manufacturer Boeing has not reported an essential modification to the type 737 MAX to aviation regulator FAA. This is evident from research by the United States Department of Transportation, published by the news agencies Reuters and AP.
These are changes to the warning system that automatically pushes the nose of the device down if it rises too quickly. Mainly due to errors in this so-called MCAS system, two planes crashed in Ethiopia and Indonesia in five months, killing 346 people.
The U.S. department has created a timeline of the aircraft’s history, running from the drawing board in 2012 to grounding in March 2019 after the two crashes.
This shows that Boeing initially dismissed the MCAS system as a relatively insignificant system, which would rarely be activated in practice. But in 2016, after the first test flights with the 737 MAX had taken place, the system was modified.
This pushed nose down with more force when the system was turned on. However, this change was never formally communicated to the FAA, so it was not examined by inspectors. …
Survivors of victims have filed lawsuits against the corporation.
US regulator approves re-certification flights for Boeing’s deadly 737 Max. By Bryan Dyne, 30 June 2020.