...90 day FDR recommendation is confusing to me. If an A/C goes down in very deep water, would this increase the odds of retrival? On the other hand, it is probably a "cheap" mod that could be done "fast" on existing units.
I'm I correct in assuming that no one has ever tested FDR at the depth where AF447 is suspected to have gone down? ...pressures at those depths must be enormous.