You can see from the debris whether the engines were producing power at impact—turbines break apart differently when they’re traveling very high,” said Peter Goelz, former managing director of the US National Transportation Safety Board,

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 crash that left at least 270 people dead.

The black boxes that have been retrieved from the wreckage of the Air India plane that crashed in Ahmedabad last week have sustained significant damage. So, what happens when the black boxes get damaged?