Over 48 hrs gone since his disappearance... he disappears right after a radio call, 15 mins prior to landing at Horn Island... no mayday... no wreckage, apart from a liferaft reported as being sighted... 13 aircraft looking for him...?
This sounds very much like a catastrophic failure, and a dive, relatively intact, in the sea. I don't understand how the wreckage hasn't been found by now... unless he was hopelessly off course... ?