The main set of records for a military service man or woman is the Official Military Personnel File (OMPF). This file can be found at the National Personnel Records Center, in St. Louis, Missouri. NPRC also holds Morning Reports, Payroll Records, Army Air Corps IDPFs, and more.
If your soldier died or was discharged by 1952, the records are available to anyone. If your soldier died or was discharged after 1952, only the next-of-kin, or authorized representative can obtain the records. Veterans can obtain copies for free, while others must pay NPRC copy fees.
The Army Air Corps which became the Army Air Forces during WWII, was under the authority of the Army. You will find records within the Army files and Air Corps or Air Forces files.
Explanation of Service Numbers on Wikipedia
Resources for Army, Air Corps, and National Guard
Aviation Archaeology – Air Force Accident Reports and Missing Air Crew Reports Databases
Fold3.com Databases for Army and Air Corps
WWII Vehicles – Japanese Aircraft Code Names
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