This Consolidated built PBY was RCAF 9746 1942 - 46. Registered N58D and N5907 after coming to the USA , it was upgraded to a Super Cat with enlarged rudder and more powerful engines. Operated from 1962 by Bird Corporation as N81RD, pilot / inventor Forrest Bird modified the aircraft further with added GSO-480 engines and other updates in 1967. Christened the Bird Innovator, it was sold in 1978 reverting to N5907. As N5PY it has been undergoing extensive rebuilt since 1997 which saw the removal of the outer engines.