Robert Irwin Snyder, AAF enlisted 10/29/42 at San Francisco,CA # 1914139

There is an inquiry for info on Robert Irwin Snyder. According to the family story he flew in the 100th BG as an TTE,Gunner,Aerial Photographer and went down THREE times in the channel.
 
I found his Enlistment record # 1914139  ROBERT I. SNYDER, ENLISTED 29 OCTOBER,1942 at SAN FRANCISCO,CA    BORN 1922, 4 YEARS HS, AAC
 
We have no records for a Robert Irwin Snyder in the 100th BG during hostilities. Anyone have anything for him in any other units? 
 
Jack