What I can't seem to get my head around is surely these Chinooks , after completion at Boeing , would have had to undergo extensive 1st. flights & pre-delivery flying with Boeing pilots to prescribed military standards before being handed over to the M.O.D. , how was it that they were not airworthy when they arrived here & also in various press reports it has been stated these aircraft had "never" flown , surely they would have all undergone stringent airworthy test flying ?