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The evidence may be again available in those black boxes in the cockpit voice recorder. and were almost 13 days in. were starting day 13. these have a life of about 30 days? >> thats correct. >> the aircraft will have two boxes. one is called the flight data reporter. the battery hes on the -- it is called the underwater location pinger. and that party is going to send out a sig fal for about 30 days. if you dont locate the boxers in that window,er that not going to have that -- you have to visu...