Originally Posted by
roundsounds
Here’s the Coroner’s report;
Report
Almost 4 years and the finding;
193. The precise cause of the crash has not been ascertained. There is no evidence of any mechanical failure. Mr Van Hattem's lack of experience in this type of flying and his performance of aerobatic manoeuvres at heights well below 3000 feet above ground or sea level, may have contributed. The possibility that a loose or uncontained tool or other article on board the aircraft may have interfered with the flight controls and prevented Mr Van Hattem from recovering from an aerobatic manoeuvre is a feasible but not ascertainable explanation for why the aircraft impacted the water.
So as said above they knew most of what happened a few days/weeks in and then waited for any extra information to come to light, after time has passed and nothing comes of it, then publish what you do know.
That being said recommendations to CASA are many and noteworthy and hopefully have some follow through.