Project 10073 Record Card and Associated Reports — Phoenix, Arizona, 4 August 1952

This document contains a series of reports and a completed observer questionnaire regarding an Unidentified Aerial Phenomena (UAP) sighting that occurred on 4 August 1952 in Phoenix, Arizona. The primary witness, an Airman Third Class (A/3C) assigned to the 127th Pilot Training Wing at Luke Air Force Base, reported observing a round, yellow-white object while performing a routine inspection of an aircraft at Sky Harbor Airport. The witness, who had prior experience as a Navy air crewman on PB4Y aircraft, described the object as being approximately three-quarters the size of a full moon. According to the witness, the object was initially motionless, then began moving in a constant course at an estimated speed of 200 mph. As the object progressed, it reportedly lengthened into a long, narrow, plate-like shape. The witness explicitly stated that the object made no sound and appeared to be a material object, dismissing the possibility of a reflection due to weather conditions. The observation lasted approximately five minutes. The intelligence report filed by Captain Frederick R. Roeper Jr. notes that the witness was an avid 'flying saucer fan.' The documentation includes the original observer questionnaire, a formal intelligence report (IR-36-52), and teletype communications (TWX) summarizing the event for higher headquarters, including the Air Technical Intelligence Center at Wright-Patterson AFB. The weather at the time was reported as clear with high visibility. The object was observed between the witness's location and the White Tank Mountains. The reports consistently describe the object's color, size, and the lack of sound, while noting the witness's background in aviation maintenance.