Exrigger: While you are totally correct about the existence of CTY servicings, you are totally wrong about their use in the 'stan by the leaping heaps - there has been no official relaxation of maintenance standards for the deployed ac. Incidentally, whilst chinook may have used CTY in GW1, Tornado certainly didn't in either GW1 or 2!
N Joe & dirty Gc have hit the nail on the head, the ac comes out with the same Lims/ADFs that it entered, the chance to rectify these faults is not taken lest it delay the pulse and thus cost the Service money......so the already stretched first line techies get the pain.