The company told regulators the changes in design and production of the door plugs would allow its warning systems to detect malfunctions. Boeing Company, Boeing 737 Max Groundings and Safety Concerns (2019), Airlines and Airplanes, Aviation Accidents, Safety and Disasters, Factories and Manufacturing, Spirit AeroSystems Inc, Alaska Airlines, Federal Aviation Administration, National Transportation Safety Board, Regulation and Deregulation of Industry, United States Politics and Government The company told regulators the changes in design and production of the door plugs would allow its warning systems to detect malfunctions. NYT > Business