It is often difficult to find black boxes (Voice recorder and DATA recorder) especially if the plane goes down in the sea. With technology advancing everyday, why can't ATCs simultaneously record these DATA through radio signals? This will help ground controllers to identify the problems till the last moment even before the black boxes are found. Agree there are hundreds of flights are in the air at any given time but computer storage facility is so advanced, it is no problem to store DATA for a few days.
If all these are found what about Malyasian Flight MH 328. No debris has been found so far on this flight. Not a single indication where it disappeared.