No flying as pilot in command, I've yet to see a rule that prohibits a pilot without a valid medical from flying as a student.
Quote:
Yet I'm not sure that a CRI may instruct a student who has no medical at all,
Why not? They're a qualified pilot, just one without a valid medical.
Genghis, please don't part quote me. I clearly stated they may engage an Instructor and fly as a student.
There is no reason this could not be a CRI. A CRI can only train licence holders, not having a medical does not negate the licence merely prevents the holder excercising the privileges as pilot in command.