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This FAA Alaskan Region Public Affairs Office release, dated March 5, 1987, is a computer printout of recorded FAA radar data for Japan Air Lines Flight 1628 on November 17, 1986. It covers 38 minutes of computer time and lists 105 radar returns. Of these, 86 are usable and 19 are uncorrelated primary returns. The printout records when the pilot first asked about other traffic and when he said he could not see the UFO. It also explains that uncorrelated returns occur when the primary and beacon signals do not match in position.
TIME AGID/SX ABC/SY REC ERM RALT PACP PDEG PRAN RX RY DDE1 DRAN XY YN BDG SPD ADS C SYS CLS 2:59:39.513 0055-1507 0000 12 2251 191 144.00 -2.20 -143.29 26 0 92 26 RO 1 TFV -2.92 -143.95
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. 179 pages are in the text index: search them above, or from the library's search.