wrote ...
It's up to the A&P to decide if the modification is a major or minor
modification. Why does the FSDO even need to know anything the
installation of a component?

I've found the problems not with the A&P installing, but with a new (to the
plane) IA a few years later who has a cow about signing it off. Those old
337's are like a "baby blanket" for most IAs.