Well. The FAA in this case is not teaching Boeing how to make planes, so your comparison is not exactly a good one. Maybe an example of another regulated industry like NHTSA or OSHA?

I.e. I don’t see gold mining companies performing their own MSHA audits, but I do see them building controls and processes to satisfy safety regulations

I remember a few times in school when we took turns grading each other's work. That scenario raises all sorts of other potential for problems, but it's an interesting thought experiment: what if Boeing were responsible for certifying Aribus' planes and visa-versa?

I do actually remember self-grading in at least a few classes in school, and it was quite effective. You learn more from grading your work (i.e. finding the errors) than if someone else does it for you.

This wasn't for final exams obviously, more like quizzes and such.

What kind of educational institution lets its employees assess how well they impart knowledge to their students?