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

Thursday’s deadly crash struck at Boeing’s most ambitious and one of its most commercially successful jet programs — a coveted airplane that airlines the world over gladly wait years to receive.

An Air India Boeing 787-8 Dreamliner plane bound for New Delhi returned to its origin of Hong Kong as a precautionary measure on Monday, after the pilot suspected a technical issue mid-air, a source with direct knowledge of the matter told Reuters.