Alaska Airlines Boeing part that came loose in mid-flight was not secured by bolts. Tests of the recovered door and fuselage indicate that all four bolts were “missing,” according to the NTSB report.

Alaska Airlines Flight 1282, a Boeing 737-9, had to return to the airport of origin after the plug in the middle left exit door became detached causing rapid decompression. Two flight crew members, four cabin crew members and 171 passengers were on board. Seven passengers and a flight attendant suffered minor injuries.