> Some authentic parts break, some inauthentic parts don't. When authentic parts break they can be traced back to the origin, investigated why did they break a

> Some authentic parts break, some inauthentic parts don't. When authentic parts break they can be traced back to the origin, investigated why did they break and what changes are needed in manufacturing to prevent future parts from also breaking, and whether the process could mean other planes need to be grounded before the part fails on them too. With inauthentic parts you don't know why it works and you don't know how it fails and you can't track back anything in the chain of manufacturing because you don't know who you're dealing with. Which is why aerospace industry doesn't use anything but original parts with tractable history.