The flight, AI 2772, carrying 105 passengers, was taxiing for take-off when the cabin crew found the note, airport officials. A hijack threat forced a Mumbai-bound Air India flight to abort take-off on Wednesday morning, triggering a full security drill and delaying departure by over seven hours. A hijack threat to a Mumbai-bound Air India flight at the Netaji Subhas Chandra Bose International Airport in Kolkata turned out to be a hoax.