Yes. Regarding logging PIC time, 14 CFR § 61.51(e) states in part: > (1) A sport, recreational, private, commercial, or airline transport > pilot may log pilot in command flight time for flights- > > (i) Except when logging flight time under § 61.159(c), **when the pilot > is the sole manipulator of the controls of an aircraft for which the > pilot is rated**, or has sport pilot privileges for that category and > class of aircraft, if the aircraft class rating is appropriate; > > (ii) When the pilot is the sole occupant in the aircraft; > > (iii) When the pilot, except for a holder of a sport or recreational > pilot certificate, acts as pilot in command of an aircraft for which > more than one pilot is required under the type certification of the > aircraft or the regulations under which the flight is conducted; or You really don't need to go any further than that. You cannot "perform the duties" or "act as PIC" without a current medical certificate, (stated elsewhere in the regulations). The FAA breaks PIC duties out separately from "sole manipulator" and your friend must be that. But if you are a rated pilot flying the airplane you can log the time while you are sole manipulator.