I can't speak for Helicopter procedures as make a point of having as little to do with them as possible, (can't speak much for fixed-wing either but I'll stick my neck out there). It is my understanding that as well as being 'sole manipulator of the controls' one also has to be 'in command' i.e. the instructor (if present) is aware that the final authority for the conduct of the flight lies with someone else. If it is a case of Adam (for example) flying the aircraft for the benefit of the instuctor/club i.e such as a check flight before solo hire - this would be P/UT (local procedures, different aircraft systems etc etc)??
If he was flying in the US on a UK (ICAO) PPL in an N Reg aircraft, it is my understanding this would be legal as long as he did not leave the US? (Assuming of course other requirements are met; Medical, Insurance etc etc)
Then again, it's FAA land so the above may be entirely bulls**t!
