United Airlines is finding loose fitting mounting bolts for the mid aft plug door 737-9 : r/boeing

Panel on Boeing Plane May Not Have Been Properly Attached, Agency Says - The New York Times

Unplanned removal, installation inspection procedure at Boeing - Leeham News and Analysis

Here's The Difference Between 'Plug Doors' And 'Door Plugs' And How Both Keep You From Blowing Out Of A Plane - The Autopian

United Airlines Finds Loose Bolts on Boeing 737 MAX 9 Door Plugs

Section of MAX 9 Blows Out During Ascent (AS 1282 PDX-ONT) - Page 30 - FlyerTalk Forums

Boeing 737 Max 9: United Airlines finds loose bolts in jet inspections

United Airlines finds loose bolts, other issues on a key part of grounded Boeing 737 Max 9 jetliners

United Airlines finds loose bolts, other issues on a key part of grounded Boeing 737 Max 9 jetliners

Alaska, United find loose hardware during inspection of 737 MAX 9s

737MAX9 Plug-Type Door : r/aviation