If the CVR/FDR are now recovered, would the data be recoverable and viable??.
That question would be easier to answer once you've filled in your missing word:
In Australia close to four ago a Westwind ditched
Four what ? Do you mean days/weeks/months/years ?
Are we talking about this one:
http://www.atsb.gov.au/media/3970107...-072_Final.pdf ?