I’ve asked the rhetorical question in other threads: What pilot or operator in his, her or its right mind would volunteer information about an incident to ATSB or CASA, given their behaviour?
[T]here is talk on the streets that it was the result of fire warnings on both engines, not improbable, but who knows. Might explain both engines being feathered. I say not improbable because on one four engine type in the past feathering an engine could result in all four feathering.
In that event there’d be defects entered in the maintenance records for the aircraft, then clearing endorsements by qualified engineers, and the whole fascinating story could be told now. Just a weird quirk of flying machinery that resulted in a prudent decision by the crew, under pressure, to make a forced landing that resulted in zero injuries or damage, with expert engineers confirming no defects soon afterwards, followed by a safe and happy flight for all concerned to the original destination.