Transcript for Missing Malaysia Plane: Racing the Clock to Find Black Box
1 d1 days after Malaysia's flight 370 went missing, we have possibly clues today. This fisherman said a jet barrelled by flying low and louder and larger than anything he's ever seen. New urgency for the plane's black box will only ping for about a month. Meaning it's already lost about a third of its battery life. As time runs out, the search area still covers more than 2 million square nautical miles. Ten times the size of Texas. Investigators are combing both land and sea in pursuit of the pings, in particular they're looking at this area off the west coast of Australia. There may be still be hope even after the pings stop, though. When air France flight 447 went down in the atlantic ocean in 2009, the boxes were found almost two years later and they still held valuable information for investigators.
This transcript has been automatically generated and may not be 100% accurate.