Four bolts used to secure a door plug on the Boeing 737 Max 9 that blew off of an Alaska Airlines jet last month were removed and seemingly not replaced before the plane was delivered, according to a report released Tuesday by the National Transportation Safety Board.
The investigators’ findings come just over a month after a door panel on Alaska Airlines Flight 1282 blew out shortly after departing Portland International Airport in Oregon on Jan. 5. The incident caused Boeing to ground all Max 9 jets immediately. The 19-page report of the door plug, which fell 16,000 feet, found that when the panel was removed to conduct repairs, not all four bolts were put back in, leading investigators to confirm that at the time of takeoff, the bolts were in fact missing.
“Overall, the observed damage patterns