According to a source, the flight was to be operated with a Boeing 787-9 plane.
Arjun Patolia, 36, came from London to his ancestral village Vadiya in Amreli district to immerse Bharati's ashes in the Narmada, as per her last wish.
Under the civil aviation ministry, AAIB is responsible for the classification of safety occurrences, involving aircraft operating in the Indian airspace into accidents and serious incidents.
Japan Airlines has become the first airline to launch Dreamliner Boeing 787 flights to India.