Spinex
Last I heard the ATSB are investigating, but given an apparent high speed impact, fire, no CVR or FDR
Did this aircraft have DYNON glass panels? I think it might have based on others I have seen.
If so, they have a very good record in surviving crash/fire events and the ATSB and Dynon have successfully retrieved all manner of flight data before. If that is the case they will have a very good picture of what went wrong.