I have 2 sources (1 form Textron and 1 from US government) that told me the first 3 chopper had indeed been deliver to Pakistan and is at the hand of the Pakistani since the beginning of this year. At the moment PAA is building hanger and maintenance centre to house and service these helicopter.
unless the ship that deliver these chopper had sunk, I am pretty sure they are already in Pakistani hand. PAA is hiding these chopper by the order of US government, as to why? No one knows, most likely it's OPSEC thing.