Between March 11 and March 13, Boeing's fastest-selling jet ever, the 737 MAX, was grounded all over the world. The relatively new aircraft had been in two eerily similar crashes within the previous six months, resulting in a total of 346 deaths. Both crashes happened mere minutes after takeoff. In the recently released preliminary report, the Ethiopian Civil Aviation Authority's investigators found that erroneous angle-of-attack (AOA) information from a faulty sensor on the 737 MAX led the plane's maneuvering characteristic i augmentation system (MCAS) to override pilots attempts to right the jet's trajectory, pitching it toward the ground in similar fashion to the Lion Air crash in October. Investigators say that pilots had been appropriately briefed on proper procedures put in place since the accident months earlier.
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