Works for me also but, when you ask ground cntrl and they say copy, does it not display the time up in the the left top corner for repair? Here's what I do after taxi to ramp. Switch The intercom control panel dial from VHF to INT and request ground power to on...once clear shut down. Request Repair, ect, ect...I'm trying to figure out where you are missing out to not getting a repair. Unless you are at a neutral airbase, I can't see why you are not getting any action on the ground crew part.