Thanks Peter. That has always been my interpretation and it’s nice to see it in writing from the Administration.
I think it is also self-evident that what is “simple or minor” to one person may appear “complex” to another, and vice versa. To that extent, the definition of “preventative maintenance“ is a subjective one which involves a modicum of common sense on the part of the Part 91 owner/pilot.
In this, and perhaps with other aspects of aviation, “a man’s got to know his limitations”. 
I agree with Jacko. It is mostly common sense.
Agree with Jacko too.
