Air India and Boeing are in the midst of significant turnarounds, but knowing the cause of the crash of Flight 171 will take a lengthy investigation.

Vishwashkumar, who was sitting in seat 11a on the Air India flight, is receiving treatment at Ahmedabad’s Civil Hospital, where he has been visited by India's Prime Minister Narendra Modi, who also attended the bedside of locals who were not onboard the plane but were struck and injured by the crash.