A lot of things are "don't tell them anything they don't need to know."
“Better to beg forgiveness than ask permission” ?
Neither is really my focus.
I’ve seen instances of different opinions ?within and between FSDO’s on
several topics. Ie. 337 required? Qualification for A &P? Whether you can
call an overhaul,an Overhaul. Activity List of aircraft for IA renewal. Etc.
Regulations are in place but can be implemented in various ways.
At times it comes down to do you want spend time arguing your point
or fixing airplanes.
Many people replace brake linings on Cleveland brakes w/o an A & P
on site. This is not Preventative Maintenance. I know of times when
it was said the Owner cannot remove the 2 bolts in order to change a tire.
Use of FaceTime or Skype to supervise these tasks would still provide an
acceptable level of safety.
IMHO most Owners want to keep their aircraft in an Airworthy condition.
Can someone cheat and defeat the system? O course. But there are folks
that borrow a buds Propeller too!