Andu, you are exactly right. The Army maintainers were on a big learning curve when BH was introduced and many mistakes were made. Also, the C&C of Engineering support was completely screwed up and caused me personally immense frustration. The TST's were not under command of the Sqn OC's and quite often had different priorities. Having said that, BH spares were not given a high priority by the RAAF so there was plenty of blame to be shared around.
We probably share some friends by the sounds of it. Let me assure you that their experience and skill was appreciated by many of us but unfortunately not always listened to by those running the show at the time.
I still maintain though that it was a great buy only we should have just stuck with bog standard UH60's. Even when we buy something good, for some reason we still have to "Australianise it" which you could also describe as "f.....g it up".