The 5.5-Degree Rule That Now Governs Every 737 MAX Takeoff After Boeing's MCAS Rewrite

Most people will remember the two fatal crashes involving Boeing 737 MAX aircraft: Lion Air flight 610 in 2018 and Ethiopian Airlines flight 302 in 2019. These accidents exposed a flight-control system that, at the time, was largely unknown outside Boeing’s engineering community: the Maneuvering Characteristics Augmentation System, or MCAS.