Dear Elbert Mackey,
Thank you for posting your inquiry on History Hub.
Air Force accident reports dated after 1955 are in the custody of the Air Force Safety Center Public Affairs, 9700 G Avenue SE, Kirtland Air Force Base, NM 87117-5670.
We hope this information is helpful. Best of luck with your research.
Per Eric Schlosser’s book “Command and Control” (The Penguin Press, New York, 2013), an excellent read on the Damascus incident as well as other nuclear weapons accidents or near accidents if you have not seen it yet, the author found a copy of the report “Report of Missile Accident Investigation: Major Missile Accident, 18-19 September 1980, Titan II Complex 374-7...” in the congressional papers of Dan Glickman at Wichita State University. There are other copies at the Titan Missile Museum in Sahuarita, Arizona, and the Jacksonville Museum of Military History at Jacksonville, Arkansas, at least as of the book’s publication date.
I hope you find this information useful.