A diagram of the #737MAX9 #DoorPlug posted by the U.S. National Transportation Safety Board on Sunday shows four bolts – two in the upper corners of the plug and two lower hinge brackets – that secure the plug to the fuselage.

"The fact that #United has now found some aircraft with #LooseBolts means that the investigation is going to be expanded.”Anthony Brickhouse, an air safety expert

United finds loose bolts on several 737 MAX planes, raising pressure on #Boeing
https://www.rappler.com/business/united-airlines-finds-loose-bolts-737-max-planes-pressure-boeing/

United finds loose bolts on several 737 MAX planes, raising pressure on Boeing

(1st UPDATE) Several industry insiders say airlines have started to hear passengers voice concerns about the safety of the aircraft, even though the MAX 9 in question is only used by a handful of carriers

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Here's the more recent problem with loose bolts. NPR:
United Airlines finds loose bolts, other problems on grounded Boeing jets #boeing #boeing737Max #bolts #loosebolts #aviation https://www.npr.org/2024/01/08/1223517098/door-plug-boeing-737-max-portland-ntsb-faa