You are covered for the amount purchased for accidental death, dismemberment or loss of sight as the result of an accident while a passenger on:

1. a regularly scheduled airline flight or regularly scheduled charter operated:

   (i) in scheduled air transportation pursuant to economic authority issued by the Civil Aeronautics Board;

   (ii) by an intrastate scheduled airline of United States registry maintaining regularly published schedules and licensed for the transportation of passengers by a duly constituted authority having jurisdiction over civil aviation in the state in which said airline operates; or

   (iii) by a scheduled airline of foreign registry maintaining regularly published schedules and licensed for transportation of passengers by the duly constituted governmental authority having jurisdiction over civil aviation in the country of registry of such airline;

2. any aircraft, other than a single-engine jet, which at the time is making a flight for the principal purpose of transporting passengers and not for any other operational, tactical or test purposes, and which is operated by:

   (i) the Military Airlift Command of the United States;

   (ii) the Royal Canadian Air Force Air Transport Command; or

   (iii) the Royal Air Force Air Transport Command of Great Britain;

3. any land or water conveyance provided at the expense of the air carrier as a substitute for an aircraft covered by this plan;

4. a vehicle licensed to carry passengers for hire, but only:

   (i) when going to an airport to board an aircraft on which You are covered by this plan; or

   (ii) when leaving an airport after alighting from such an aircraft;

5. received while upon airport premises designated for passenger use immediately before boarding or immediately after alighting from an aircraft on which You are covered by this plan.