WASHINGTON — The National Transportation Safety Board says four key bolts were "missing" when a door plug blew off an Alaska Airlines flight in midair last month. That's one of the findings from the NTSB's preliminary investigative report released Tuesday.
The Boeing 737 Max 9 jet had departed Portland, Ore., and was climbing through 14,800 feet when the door plug explosively blew out. It resulted in a rapid depressurization and emergency landing back at Portland.
