Lou wrote:


Is this true? If I own an airplane and a friend who is a CFI keeps
borrowing my plane to instruct a third party for his personal fee, the
plane needs a hundred hour inspection?

ABSOLUTELY.

I'm new at this game, but that
doesn't sound right. My understanding is that if the plane is a rental,
it needs a hundred hour inspection.

INCORRECT. Rental has no bearing on the issue. The rules say
"carrying passengers for hire, or flight instruction when the
instructor provides the aircraft." If an instructor comes and
flies with me in MY aircraft, no 100 hour is required. If it comes
in his aircraft (or the club/fbo that employs him), the 100 hour
is requied.

I am certain that the flying club I
belong to has hundred hour inspections only due to the club rules not
the FAA. The planes in my club are considered owned by each member, not
rented.

Ownership again isn't so much of an issue. The issue is if the club
provides both the instructor and the plane, it needs a 100 hour. If
the club just rents you the plane and you go out and get your own
instructor, it is not.