At high speed and without any of the experienced pilots able to stop it, the fatal Boeing 737 MAX Ethiopia Airlines plunged back and forth again on the ground, due to the incorrect activation of an automated system, before finally colliding with the death of 157 people.
The above mentioned, in short, the Preliminary Report of the Ethiopian Principles on Air Tragedy last month, which was released yesterday.
As pointed out in the document, Gov. Yarend Gekatsiu shouted a desperate "climb" on the aircraft at least three times while continuing to dive to the ground, although pilots applied all the procedures and instructions required by the manufacturer to disable the troubled system. .
The tragedy of March 10, which bears many similarities to another accident Boeing 737 MAX 8 in Indonesia last October, during which 189 people were killed, led to the global collapse of this specific aircraft model.
Announcing yesterday discoveries of the preliminary investigation, Ethiopian Transport Minister Dagwavet Mojzes stressed that Boeing should "review the aircraft's flight management system."
He also asked the aviation authorities "to verify that the aircraft's flight management system was properly made by the manufacturer" before the Boeing 737 MAX fleet was allowed to reopen.
How MCAS Works
Although not specifically mentioned in the MCAS, which many experts believe to be responsible for the crash, Mozzess spoke of a repetitive vertical drop motion of the aircraft. "The crew often performed the manufacturer's instructions but was unable to regain control of the aircraft," the minister said at a news conference.
The MCS ("Maneuverability Enhancement System") is specifically designed for the 737 MAX and automatically activated when an aerodynamic anomaly linked to the increased engine weight needs to be corrected. Last November, Boeing issued a warning to crews, pointing out that an error in the sensor that measures the angle of attack can result in MCAS suddenly taking the plane to a "nose-to-ground" course.
In this case, the company advised the pilots to turn it off mechanism and reset the airplane to the correct position manually.
It is noteworthy that, according to Amedey Fentha, head of the Ethiopian Accident Information Office, who told reporters at the same press conference, no trace of damage from an external object such as a foreign body was found in the first phase of search. bird, aircraft equipment, and no structural problems with the fatal Boeing MAX 8.
This statement denies your report yesterday ABC News, who reported (citing sources in the next research cycle) that an aircraft sensor was damaged by an accident with an external object and that "turned on" problematic software.
In a statement issued after the announcement of the preliminary findings, Ethiopian Airlines noted that the company is proud of the professionalism and conscientiousness shown by its pilots.
– Ethiopian Airlines (@ flyethiopian) April 4, 2019