Just another rumour that I got via text message from friends in QLD. Apparently, according to Brisbane ATC, the 407 lost height very abdruptly from its cruising alt of 1500 ft to just above sea level in very very quick time, estimates of about five to six seconds.
Those that know the aircraft and its performance capabilties might be able explain what might have caused this. This throws doubts on the pilot error scenario in my opinion.
Autorotate.