There have been cases of a very small number of survivors in very serious accidents, but it is "very rare" for there to be only one, a professor told Newsweek.

Air India had hiked the insurance cover on the ill-fated Boeing 787-8 Dreamliner aircraft from Rs 750 crore to Rs 850 crore following an engine replacement in April this year, Times of India reported citing people familiar with the matter. The total claims from the plane crash are expected to exceed Rs 1,500 crore, the report added.