What channel were you watching? American got rid of the 747SP's years ago. They felt that the operating expenses where too great. Their MD-11's carry about the same amount of passengers at a greater range using less fuel with a decrease in the cost of operation (not to mention 1 less crew member because the MD-11 doesn't need a flight engineer).
American acquired both 747-SP's it operated from TWA in the late 1980s to operate new DFW-NRT service. TWA utilized the 747-SP on flights from JFK
to Kuwait City and other points in the Middle East during the 1980's.
When American acquired TWA's London routes in 1991, it briefly deployed
the 747-SP's to operate two JFK-LHR flights.