The preliminary finding gives investigators a new line of inquiry as they study a crash that killed all but one of the plane’s passengers.

The black boxes will provide cockpit conversations and data related to the plane's engine and control settings to investigators and help them in determining the cause of the crash.

Air India has cancelled eight international Boeing 787-8 Dreamliner flights after the horrific aviation disaster last week. The passenger jets were hit by a mix of issues from aircraft unavailability, technical snags, airspace restrictions, and extended safety checks.