18 August 2020 by Phillip Johnston • Last updated 10 June 2021The Boeing 737 MAX-8 and MAX-9 aircraft were grounded after Ethiopian Airlines and Lion air crashes both resulted in the deaths of everyone on board. The implicated system is the the Maneuvering Characteristics Augmentation System (MCAS), which is part of the flight management computer software. The MCAS was designed to correct for an increased potential to stall the plane due to mechanical design changes. When fed an Angle-of-Attack reading from a bad sensor, the MCAS triggered at an improper time, forcing the plane nosedown and overriding pilot input. The …
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