A split federal appeals panel upheld the firing of a disabled airline employee.The 7th U.S. Circuit Court of Appeals affirmed a trial court ruling that the termination of an American Airlines worker was justified because she was no longer qualified for her role when it changed after the airline’s merger with US Airways. Kimberly Bilinsky worked for Dallas-based American for more than two decades, arranging to work mostly from her home in Chicago after getting multiple sclerosis in the late 1990s.But after the company …