https://www.cnbc.com/2019/03/29/ethiopian-crash-boeing-737-max-anti-stall-system-likely-activatedwsj.html > Investigators looking into the fatal Ethiopian Airlines crash involving a Boeing 737 Max plane are said to have reached a preliminary conclusion that an anti-stall system on board misfired, the Wall Street Journal reported Friday. > Based on data retrieved from the flight's black boxes, the stall prevention system — known as the MCAS, or Maneuvering Characteristics Augmentation System — activated automatically before the plane nose-dived into the ground, the Journal said, citing people briefed on the matter.