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.

In a key step after the deadly Air India Boeing 787 Dreamliner crash, the Ministry of Civil Aviation has released new draft rules to tighten control over physical structures that may pose risk to aircraft safety.

Air India faces fresh turbulence following last week’s fatal crash as additional safety inspections on its Dreamliner fleet lead to flight delays, cancellations and growing passenger anxiety