As this is also a multi issue thread and at the risk of being accused of oversimplification may I put forth these facts, (with the benefit of hindsight);
1) CASA has deemed Transair unsafe and withdrawn their AOC.
2) CASA has deemed Aerotropics safe and have not withdrawn their AOC.
Would it not then stand to reason that had the flight been flown by Aerotropics the disaster would not have happened.
I note the Coroners matter has begun in Brisbane and thenceforth to Cairns.