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Black boxes recovered from plane crash in Washington DC. Here's what they can reveal
Investigators have recovered the so-called black boxes from an American Airlines Bombardier ... The CVR usually contains two hours of recordings on a loop and this is being extended to 25 hours.
Explainer-How black boxes hold vital clues to air disasters
Investigators have recovered the so-called black boxes from an American Airlines Bombardier CRJ-700 regional jet, which collided with a U.S. Army UH-60 Black Hawk helicopter and crashed into the ...