I don't think you will find a listing of American pilots by itself.
There is a database of American soldiers located here:
http://aad.archives.gov/aad/series-list.jsp?cat=WR26
If you can find his name here it may give you hints about where he was born, where he enlisted and perhaps his peacetime occupation.
More specific information may be found if you can identify his unit. Many groups and squadrons have web sites that mention members.