In the 80s I worked for a major supplier of test equipment, biggest customers were the defence contractors and air forces for production testing and in-service support test rigs. Tornado was the last platform that needed a reasonable amount of precision analogue measurements, it was on the cusp of the digital processing revolution with most testing moving towards being built-in (BITE) and Line Replaceable Units. We had supplied stacks of precision test equipment for planes and missiles such as Lightning, Buccaneer, Phantom, Jaguar and Harrier plus Sky Flash, Sea Wolf, Sea Dart, Rapier, Sea Eagle etc. mainly on accurately testing analogue computers and guidance control systems.
Happy days - I guess everything with Typhoon, F35, A330 is all LRU replaceable now and simply return to manufacturer for service / repair with nothing done at hangar or depot level?