Initial safety reports said that the MCAS system would allow the tail to move 0.6 degrees at the most, which would allow a 5 degree nose-down movement of the plane.
The loss of Ethiopian plane is not so far included, despite apparent similarities between the two accidents highlighted by the Ethiopian minister of transport over the weekend.
ASSOCIATED PRESS After two deadly plane crashes in the past five months, Boeing is facing scrutiny over a software program that was developed to help its new planes avoid stalling mid-air.
Investigators are reportedly seeking documents and correspondence related to the Boeing 737 MAX's development.
It comes as Ethiopia's transport minister confirmed the black box from the plane is in good condition.
It said procedures already exist to "safely handle the unlikely event of erroneous data coming from an angle of attack (AOA) sensor", the suspected cause of the Lion Air crash.
Questions have honed in on an automated anti-stalling system introduced on the 737 MAX 8, created to automatically point the nose of the plane downward if it is in danger of stalling.
While 376 separate 737 Max orders have been fulfilled, some 4,636 orders were still outstanding as of February, Bloomberg recently reported, and some carriers have reportedly been reconsidering whether they want turn to competitors.
- Investigators are expected to release a preliminary report based on information they glean from the data and cockpit recordings captured by the two black boxes.
In the case of the Lion Air flight, pilots had difficulties with a new system on the Boeing 737 Max which is created to keep the plane from stalling.
Dennis Tajer, an American Airlines pilot and a spokesman for their union, said Boeing held a discussion with airlines last Thursday but did not invite pilots at American or Southwest, the two US carriers that use the same version of the Max that crashed in Indonesia and Ethiopia.
The Seattle Times reported that the US Federal Aviation Administration (FAA) "pushed the agency's safety engineers to delegate safety assessments to Boeing itself". Articles appear on euronews.com for a limited time. Although Boeing has pledged to update its software by April, the aviation company did not announce plans to revamp its training.
"MCAS is created to automatically counteract that tendency and point the nose of the plane downward".