The Black Box isn't black, and it's not a box either. It's the most vital tool in any air crash investigation—recording speed, altitude, pilot conversations, and warning signals.

Black boxes analyzed for cause of Air India crash that killed 270. Both flight data and cockpit voice recordings are crucial to piece together the sequence of events that led to the fatal crash.

NEW DELHI, Delhi — Investigators in India are studying the black boxes of a Boeing 787 Dreamliner after recovering them from the aircraft wreckage to ascertain the cause of last week’s plane ...