Exactly. Match up the tail numbers and their recent routes and maintenance history. If nothing there then look up the company's guidelines on maintenance. The "Boeing bad" trope is too easy of a trap to get into. And I say that working on Boeing freighters and seeing some of the stuff that's there. Follow the evidence. And quickly, if it is the case of a company or even a single person screwing up regularly. There's likely to be other planes flying with problems.