Joe,During the Bicentennial every manufacturer cashed in on the celebration by producing a Bicentennial locomotive or train set thus Lionel used the name “American Flyer” as a attention getting shout out for that Bicentennial set(note the red,white and blue box-catchy isn’t it?) which had nothing to do with A.C. Gilbert’s American Flyer line of S Scale trains.
Today Lionel may have been sued using AF’s name on that train set.