I can understand that, and if over 60 days and under 90 then it can be done with a group member who is not an instructor as the person being checked is still legal (and the other pilot is STILL technically a passenger), but I cannot see any reason for a check with a group member if one has been done by an instructor.
The only reason I could see for this would be if the aircraft in question was a particularly exotic or strange handling one with no instructors around who were considered competent on it.
Last edited by foxmoth; 14th Jun 2013 at 15:09.