Boeing and the FAA have improved training and processes since 2024 incident, according to the NTSB, but board officials said both organizations need to better identify manufacturing risks.

After a year and half of investigating, the top U.S. aviation investigator formally determined that Boeing and its chief regulator were to blame for the Alaska Airlines blowout.

The nation's top safety investigators concluded that a lack of basic safety processes at Boeing, coupled with an inexperienced workforce, contributed to the door plug blowout in January 2024.