https://phys.org/news/2019-03-boeing-max-certification.html > Boeing and regulators face increased examination over the stall prevention system, the Maneuvering Characteristics Augmentation System or MCAS, which authorities have said was likely a factor in deadly crashes in Indonesia in October, while the crash in Ethiopia earlier this month showed similarities. > "The FAA considered the final configuration and operating parameters of MCAS during MAX certification, and concluded that it met all certification and regulatory requirements," Boeing added.