Seems like a maintenance union problem, not a Boeing problem.
It’s not Herb Kelleher’s Southwest Airlines anymore.
Possibly, but it could also be an issue with the parts from Boeing and they have had issues with counterfeit ones.
https://www.cbsnews.com/news/new-boeing-whistleblower-alleges-faulty-airplane-parts-may-have-been-used-on-jets/