 The Wittman "O&O" N41SW (41 for 1941, year of his first marriage, plus SW, his initials) crashed five miles south of Stevenson, Alabama, killing both Wittman and Muir.The cause was improper installation of the wing fabric, causing it to debond, resulting in aileron/wing flutter.In 2014, Wittman was posthumously inducted into the National Aviation Hall of Fame.