India, June 19 -- The heavily damaged black box of the crashed Air India Boeing 787 Dreamliner will be sent to the United States for data recovery, media reports said.

The recovery efforts in India have proved to be unsuccessful.

The Digital Flight Data Recorder (DFDR) and Cockpit Voice Recorder (CVR) will be examined at the National Transportation Safety Board (NTSB) laboratory in Washington DC.

The specialists in this case will have to extract the memory boards manually for which expertise is not available in India.

A black box refers to two critical flight recording devices on an aircraft- Flight Data Recorder and Cockpit Voice Recorder.

While the Flight Data Recorder (FDR) records technical flight data (speed, altitude, engine pe...