I'm searching for CAB files related to the investigation of a mid-air explosion of a Pan Am jet over Elkton MD on Dec. 8, 1963. I was able to locate the final CAB report online, but my interest centers on the working files and/or the transcript of the hearing. About a year ago, I searched the NARA online finding aids and wasn't able to pinpoint a records group to examine.
Hi Mike -
It looks like your best bet is Record Group 197: Records of the Civil Aeronautics Board. Alternatively, there might be something about later legislation in Record Group 237: Records of the Federal Aviation Administration. Either way, your best bet would be to email the Reference Staff at the National Archives at College Park, MD. They can be contacted at Archives2Reference@nara.gov.
Happy searching!