Seattle, Washington - Boeing made a presentation to its stakeholders on Dec. 3 and 4 in Seattle. The main goal of the presentation was to regain the confidence of airlines, pilots, cabin crews and industry experts.
According to the leaked details of Boeing's presentation, the planemaker is promising three key fixes to the 737 MAX's stall prevention system known as MCAS that was linked to the two fatal crashes within five months.
MCAS (Maneuvering Characteristics Augmentation System), the anti-stall prevention system of the 737 MAX jets, was designed to automatically push the plane's nose down to prevent a stall situation in the air. But, due to faulty data from a sensor, it forced the Lion Air and Ethiopian 737 MAX 8 jets into an unstoppable dive in both crashes which killed 346 people.
According to the final investigation report, MCAS pushed the Lion Air 737 MAX's nose down more than 20 times, each time pilots tried to force the aircraft's to AOA (Angle of Attack) upwards.
Also read: How the Boeing MCAS System Really Works
Boeing is now promising three major fixes for the 737 MAX's faulty stall prevention system:
First, MCAS will now rely on readings from both AOA sensors located in front of the plane. The system will now require the two sensors to match in order to activate MCAS.
Second, and the most important, Pilots will be able to deactivate the system.
And finally, MCAS will not automatically reactivate when it was deactivated by pilots.
During the presentation, Boeing also said that 1,850 flight hours performed to test the updated software, and more than 100.000 work hours spent in engineering and testing the system.
Boeing also said that an additional 737 MAX simulator training for pilots is not necessary when the aircraft returns to the service.
Instead of simulator training, Boeing plans to provide 737 MAX operators with so-called "mandatory computer-based training modules" besides other training materials.