The Type A-2 flying jacket was standardized by the U.S. Army Air Corps as the successor to the Type A-1 flying jacket adopted in 1927. The Type Designation Sheet lists the dates for Service Test as September 20, 1930, and Standardized (adopted as standard issue) on May 9, 1931. The military specification number for Type A-2 is 94-3040. The Drawing Number was given as 31-1415, but the spec. labels found in the jackets themselves show this to be 30-1415.