When tragic aviation accidents happen, soon after the search for survivors comes the search for the so-called black box, every commercial plane has them. Companies like GE and Honeywell designed them to be nearly indestructible to help investigators understand the cause of a crash. >> They're very crucial because it's one of the few sources of information that tells us what happened leading up to the accident.>> Microphones in the cockpit also pick up more than pilot conversation. About 37 seconds after the ...