Reply To: Boeing 737 Max

What happened in both the Lion Air and Ethiopian Air crashes was simply an MCAS malfunctioned. After the Lion Air crash, Boeing revealed the MCAS system. When pilots first found out about it, they felt betrayed by Boeing, because they didn’t tell them about the system. But Boeing and the FAA agreed that it required no additional training, as all one had to do was to turn off the system. When the Ethiopian plane crashed, more facts about MCAS were revealed.
MCAS worked based on a single angle-of-attack (AOA) indicator which measured the angle between the wing and the air. When the angle became to great, it activated and forced the planes nose down with the trim.
That is one of the mistakes that Boeing made, and they are currently working to add a second sensor to the system. But that is not the only reason the planes crashed.

Captain™