A decadeslong conflict over ownership of a World War II fighter plane has been settled, at least for now.Richard Vartanian’s quest to reclaim a vintage plane from Charles Greenhill ended last week with U.S. District Judge John Robert Blakey ruling in Chicago federal court that the statute of limitations bars Vartanian’s claims.Blakey granted Greenhill’s motion for summary judgment in his defamation claim against Vartanian. Greenhill’s suit argued that, in his efforts to reclaim the plane he once …