The aircraft was en route from Tambaram Air Force Station in the city of Chennai on the western coastline of the Bay of Bengal to Port Blair in the Andaman and Nicobar Islands. There were 29 people on board. Radar contact with the aircraft was lost at 9:12 am, 280 kilometres (170 mi) east of Chennai.[1][4] The search and rescue operation became India's biggest search operation for a missing plane on the sea in history.[5]