Originally Posted by skydisaster

I believe that this document help you to think through this topic. http://rgl.faa.gov/regulatory_and_guidance_library/rgorders.nsf/0/2cb5ef03329af90f862572600078650e/$FILE/N8000_347.pdf

To my knowledge, there is no FAR to prevent the scenario that you described, but it does fall under operational control restraints imposed by the certificate holder's Ops Specs. While it is perfectly permissible for a part 91 crew to fly the airplane for the owner, when the next 135 flight is flown conformity to 135 maintenance requirements must be established. The simplest way to address this issue is to always have the airplane by a 135 crew, but that is not actually a requirement.