The NTSB determined that "multiple system failures," including poor practices at Boeing and poor oversight by the FAA, caused the Alaska Airlines flight door plug blowout in January 2024.

One of a team of 24 had opened a door-plug before, but he was on vacation — leading the NTSB to criticise Boeing's on-the-job training.

National Transportation Safety Board investigators on Tuesday made new safety recommendations following the Jan. 5, 2024, incident in which a door panel blew out on an Alaska flight.