Greeknight 121 - you were correct when you said the the RAAF as the RAN has handed over all engineering airworthiness to the RAAF in late 90's, early 2000. The RAAF then said the a/c must meet the FAA regs (FAR 35 I think but don't yell at me the actual number). This meant the simplex software in the SeaSprite AFCS was inadequate and then Kaman had to devise a duplex solution. The problem with this whole project that it has been going so long, the goal posts have changed many times and thus the manufacturers have had to keep moving as well.
The initial purchase was supposed to be for the joint Aus/Malaysian Offshore Patrol vessel (OPV) but this was scuttled before the SH2 was sighned for. One of the reasons I left the RAN was this poorly designed and run project- the only people who thought it was a good idea was the project team. The SeaHawks 10 years before were a similar sh*tfight.