After three days of intense search, the missing part of the Black Box of the ill-fated Air India Express flight has been found at the crash site.
The Digital Flight Data Recorder (DFDR), mounted in the aircraft's tail, will give details such as the plane's acceleration, engine thrust, airspeed, altitude and rudder position - vital factors for the crash investigators, NDTV.com reports.
Searchers recovered the flight data recorder from the wreckage of the Boeing 737 which crashed at Mangalore airport in southern India after overshooting the runway, killing 158 people.
Rescue teams have been scouring the crash site for the past four days. The cockpit voice recorder was found on Sunday.
But it is the black box, which records every flight parameter from take-off to landing, that investigators believe holds the key to understanding what went wrong.
The Indian government has promised a full investigation into the nation's worst plane crash in more than a decade, ABC Online says.