flight recorder 
noun
A device in an aircraft that records technical details during a flight, used in the event of an accident to discover its cause.It works just like a black box flight recorder in an aircraft....
- At each of the crash sites, rescue workers have been issued with pictures of the black-box flight recorder and the voice recorder, which will give vital clues to investigators trying to reconstruct the last minutes of the doomed flights.
- Smith and Barnette are quick to caution, however, the final animated product is strictly a recreation of events drawn from the flight recorder data.
- the back of one's mind
- the Backs
- the Balearics
- the ball is in your court
- the ball of the foot
- the ball of the thumb
- Theban
- the Bank of Mum and Dad
- the Bar
- the Bard
- the Bard of Avon
- the bare bones
- thebe
- the be-all and end-all
- the Bear
- the Beatitudes
- the beautiful game
- the beautiful people
- the Beehive
- the bee's knees
- the beginning of the end
- the benefit of the doubt
- the Berg
- the Bermudas
- Thebes