The aircraft was equipped with a model FA2100 solid-state cockpit voice recorder (CVR) and a flight data recorder (FDR). Both units were installed in the aircraft’s tailcone.
The CVR recorded the previous 120 minutes of in-cockpit audio information based on an endless-loop principle. The recorded information included audio inputs from the pilots’ headsets and from the ‘cockpit area microphone’ that was installed in the centre of the glare shield. Each input was stored on separate channels in the CVR’s solid-state storage device.
The wreckage was in 48 m of water in open sea, which required specialist divers and major support equipment from mainland Australia to carry out any attempt to recover the FDR and CVR. In comparison with the recovery risk, the availability and quality of the information provided by the flight crew, medical staff and passengers
From the actual report, serial numbers and tech detail not available. But a 'guestimated' opinion would be appreciated.