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This Project Blue Book file, released through The Black Vault, covers the RB-47 encounter of 17 July 1957 over Mississippi, Louisiana, Texas and Oklahoma. It includes the record card, which lists the sighting as identified as American Airlines flight 655, and Air Defense Command correspondence that carried the sighting as unknown. There is also Major Lewis D. Chase's observer data sheet and an electronic analysis finding it difficult to conclude nothing was present. James McDonald's reconstructed account is included, along with a CAA letter about airliner incidents.
“Mineral Wells”2 pages
# UNCLASSIFIED SUBJECT: Request for Analysis - Electronic UFO Report TO: AFCIN-4E4 ATTN: Capt. G. T. Gregory FROM: AFCIN-4E1 DATE: 30 Oct 57 COMMENT NR 2 AFCIN-4E1a/V. D. Bryant/jc 72131/B1dg 263-D/Rm 14 1. This report is difficult to evaluate because there is such a mass of evidence which tends to all tie in together to indicate the presence of a physical object or UFO. With the exception of rather abrupt disappearance of returns on the electronic equipment and indication that the object traveled at relatively high speed, there are no abnormal electronic indications such as are usually present in reports of this type - extreme speeds, abrupt changes of course, etc. These abnormal indications are usually the basis for considering anomalous propagation, equipment malfunction, etc., as responsible for the "sightings". 2. The electronic data is unusual in this report in that radar signals (presumably emanating from the "object") were picked up. These intercepted signals have all the characteristics of ground radar equipment, and in fact are similar to CPS-6B. This office knows of no S-band airborne equipment having the characteristics outlined. 3. Since the type equipment on the ground (at "Utah") is not known, and since there are no "firm" correlation between the ground intercept and the sightings from the aircraft, it is impossible to make any determination from the information submitted. On the other hand, it is difficult to conclude that nothing was present, in the face of the visual and other data presented. 1 Incl n/c Column of Mammon Capt Classification: Canceled (or charged to WELAS) Auth. Cintanilla, St. Joseph, WKF Sy. PT (CLEAR) Date 29 Jan 69 APK 025-11 June 1-126 Page 1 of 1 page Cy / of 4 cys
Document, cited by the archive. The PDF is mirrored here; the original link is under it. The text was read from the page images by an OCR model; expect the odd misread word. 57 pages are in the text index: search them above, or from the library's search.