United Airlines finds loose bolts on multiple Boeing 737 Max 9 planes

The lost door plug was found in the back garden of a home (National Transportation Safety Board via AP)

United Airlines on Monday said it found loose bolts and other “installation issues” on a part of some Boeing 737 Max 9 jets that were inspected after a mid-flight blowout on a similar Alaska Airlines jet on on Friday.

The inspections are focused on plugs used to seal an area set aside for extra emergency doors that are not required on United and Alaska Max 9s.