The blowout aboard Alaska Airlines flight 1282 in January 2024 occurred minutes after it took off from Portland, Oregon.

Boeing created no paperwork for the removal of the 737 MAX 9 door plug – a piece of metal shaped like a door covering an unused emergency exit – or its re-installation during production, and still does not know which employees were involved, the NTSB said on Tuesday.

Boeing failed to provide adequate training, guidance and oversight to prevent a mid-air cabin panel blowout of a new 737 MAX 9 flight in January 2024 that spun the planemaker into a major crisis, the National Transportation Safety Board said on Tuesday.