Originally Posted by 2close
My enquiry simply relates to the need for a licenced engineer to remove a simple 'plug n play' (I use the term loosely) Nav/Comm unit, .....................to are held in their tray by one securing screw. No fiddling about with any wiring, etc. on the other side of the tray, just that one infernal screw .
As ukv1145 & 717tech and others have rightly point out, it is not simply one screw.
See the link for testing and the cost of the test kit.
Aircraftmech
Avionic tool . THE VOR/ILS/MB TESTSET