Ethiopian Airlines accident: automatic anti-stall system activated

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Citing several unnamed sources, the WSJ reported that the results are the first to be uncovered based on data extracted from the black boxes of Flight 302.

Earlier this month, the federal agency of the Federal Aviation Administration had grounded all the Boeing 737 Max, claiming that she had identified similarities between the crash of Ethiopian Airlines and that of Lion Air in Indonesia, six months earlier.

The Ethiopian Minister of Transport later reiterated this point, saying the preliminary data retrieved from the crash black boxes in Ethiopia showed similarities with the Lion Air crash.

Ethiopian Airlines Flight 302 crashed on the morning of 10 March after taking off from Addis Ababa to Nairobi, Kenya, killing 157 people.

Lion Air Flight 610 crashed into the Java Sea in Indonesia on October 29, after taking off from Jakarta. The 189 people on board are dead.

The findings reported come from a preliminary report that the investigating authority must produce within 30 days of an incident. The findings are not final and are subject to change as the investigation continues.

If confirmed, the preliminary findings cited in the Wall Street Journal would suggest that the automated flight software known as the Maneuvering Characteristic Augmentation System (MCAS), installed in both aircraft, could be at the origin of both incidents.

The MCAS is a system that automatically lowers the nose of the aircraft when it receives information from its external attack angle sensors (AOA) indicating that the aircraft is flying too far slowly or too strongly and may stall.

In the Lion Air crash, the MCAS forced the plane to sting more than 24 times before hitting the water, according to a preliminary investigation conducted by the Indonesian National Committee on Transportation Safety, which also discovered that the system was responding to a faulty sensor.
Pilot: Can the pilots trust Boeing again?

Investigators also indicated whether the pilots had sufficient training with the system.

According to Ethiopian Airlines General Manager Tewolde GebreMariam, pilots moving from the Boeing 737 Max 8 aircraft to older 737 aircraft were only required to complete a short training program mandated by Boeing and approved by the FAA.

GebreMariam also stated that the flight simulator on which the pilots had been trained to learn to fly a Boeing 737 Max 8 did not reproduce the automated MCAS function studied by the accident investigators.

Spokespeople for the Southwest and American pilots unions said that the self-administered course – which one pilot told CNN that he was using on his iPad – had highlighted the differences between the Max 8 and older 737 models, but without explaining the MCAS functionality.
On Wednesday, Boeing unveiled a redesigned software system and pilot training for its 737 MAX aircraft.
Ethiopian Airlines is a symbol of national pride. Now a disaster has put him under surveillance
At the Senate hearings in Washington on Wednesday, Trump administration officials were commended for the decision to defer to Boeing much of the 737 security certification.

Transportation Secretary Elaine Chao said she found "very questionable" that safety systems are not part of Boeing's standard equipment for its 737 Max.

A Boeing official said on Wednesday that the company had conducted several "in-depth audits" since the Lion Air crash and that it "found" nothing about us. "

"If you look at the performance of the system, it would indicate that we continue to learn and improve better and better over time, and so now, I would be very careful to charge any part of this process up to the point. what we know more about the details of these accidents, "said the manager at CNN.

Gregory Wallace, David Shortell, Haley Byrd, Ralph Ellis, Oren Liebermann, Richard Quest and Masrur Jamaluddin, both of CNN.

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