There seems to be a lot of focus on that it was an EFATO, the news reports don't say much other than it went down behind the mangroves out of sight and then was later found by another aircraft in the circuit. Could have been numerous things, incapacitation, EFATO, other control failure, who knows. Unless the airframe failed, which does not look likely, then aircraft age and (old) history have almost nothing to do with it. Looks like the rear underside of the fuselage took quite a beating in the sequence so it may not have initially hit inverted. In any case ATSB will figure it out at some point.