I found it interesting that Boeing did proactively tell airlines to inspect 737 MAXs for a possible loose bolt in a different part of the plane (rudder section) at least 8 days before the January 5th event. Example story: https://www.reuters.com/business/aerospace-defense/boeing-ur...
Unfortunately, Boeing did not know they had other issues with the plug door bolts.
Unfortunately, Boeing did not know they had other issues with the plug door bolts.