Don't expect a report any time soon.
The oldest incident on the ATSB website that the report is still yet to be released is this tragedy:
Collision with terrain involving Cessna 441, VH-XMJ, near Renmark Airport, South Australia, on 30 May 2017.
=13pxThere are older incidents on the ATSB website without final reports, but the release date is either N/A, or the investigation discontinued.
I note with interest that an accident at YLEC last winter that resulted in two deaths has been handed back to the RAus to investigate, which left me gobsmacked.