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Black boxes help investigators determine what happened in any airplane accident. Find out what's inside a black box.

Cockpit Voice Recorders (CVR) and Flight Data Recorders (FDR) Large commercial aircraft and some smaller commercial, corporate, and private aircraft are required by the FAA to be equipped with two black boxes that record information about a flight. Both recorders are installed to help reconstruct the events leading to an aircraft accident. One of these, the Cockpit Voice Recorder (CVR), records ...