I might have missed it but on the recommendation of the Senate Enqiry two simple questions.
Have the recorders been raised yet?? It is still possible they can provide some useful answers. Or is it in someone interests for this not to be so. I was, at around that time, in the throes of spending well over $600k to make an aircraft compliant. It did not make the aircraft any safer, just provided the obvious opportunity to learn if it did go upside down.
So why bother if you are not going to raise them.
And, shortly after the accident was there a vessel capable of doing so nearby and if so why was it not tasked to do so and who ordered it not to. I have seen the underwater video and from my limited knowledge of things underwater It seemed hardly challenging.