Report of Unidentified Flying Object (UFOB) — Tulsa, Oklahoma, 12 September 1957

This document details a Project 10073 record card and subsequent correspondence regarding an unidentified radar return observed on 12 September 1957 in Tulsa, Oklahoma. An electronics technician at the Douglas Aircraft Company, while performing a ground check on an APS-64 radar set (part of a B-47 MA-7 bombing system), observed a return at approximately 60 miles range. The object was tracked for 9 seconds, traveling from North to South at an estimated speed of 24,000 miles per hour, before disappearing in the center of the scope. The witness did not report the incident until 8 October 1957. The official report, authored by Lt. Colonel James C. Arnold, suggests that because the radar set was on the ground and typically receives reflections from objects below it, the probability of a genuine flying object is extremely remote. It was concluded that the return was likely a radar malfunction, despite the technician's inability to find any fault with the equipment during subsequent checks. The report was forwarded through the Oklahoma City Air Materiel Area (OCAMA) to the Air Defense Command and eventually to the Air Technical Intelligence Center (AFCIN). The Air Defense Command noted that due to the significant time lapse between the sighting and the report, no further investigation would be conducted. The final evaluation by AFCIN-4E1 on 13 October 1957 formally concurred with the assessment that the observation was caused by a radar malfunction.