Other Unclassified Complete

733667-001-022-0011

National Archives and Records Administration

Released

—

Published

—

Added to archive

Jun 16, 2026

Department

National Archives and Records Administration

Original size

2.1 MB

External ID

b796bba5b9e3442db7b9967e955aad46500a3a45fb2e8ee8b06c8ff12c4ef75e

Confidence

85%

Credibility

90%

View original document ↗ hosted at the official government source

Intelligence summary

This document is a memorandum from the U.S. Department of Transportation's Federal Aviation Administration discussing the radar targets associated with Japan Airlines flight 1628, which experienced unusual radar phenomena on November 17, 1986. It addresses the interpretation of 'split images' on radar and includes an analysis by Dennis Simantel.

Tags & topics

Aviation SafetyRadar AnalysisUAP Phenomena Aviation JAL1628 Radar UAP

Extracted timeline

Jun 15, 1986

Document Date (year hint)

Document Date (year hint) for 733667-001-022-0011

Jun 16, 2026

Ingestion Date

Ingestion Date for 733667-001-022-0011

Jun 16, 2026

Document Record Date

Document Record Date for 733667-001-022-0011

Jun 16, 2026

Update Date

Update Date for 733667-001-022-0011

Entities mentioned

U.S. Department of Transportation Federal Aviation Administration Japan Airlines flight 1628

Full document text

1,062 characters, transcribed via OCR. Errors reflect the source scan. Compare with the original ↗

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Q Memorandum US. Department of Transportation . Federal Aviation Administration Subject! INFORMATION: Description of Radar Split Image; vate: FEB 27 |987 AAI=-5 Memo of 2/5/87 Reply to From: Manager, Airway Facilities Division, AAL-400 Attn. of To. Public Affairs Officer, AAL-5 This letter transmits our analysis of the radar targets associated with JAL flight 1628, on November 17, 1986, and supplements discussions we have had regarding what has been referred to as "split images". We concur with the interpretation provided to you by the Alaskan Region Air Traffic Division. The attached Analysis of Uncorrelated Primary and Beacon Targets by Dennis Simantel covers the subject in more detail, and addresses the questions raised in your letter. Paul, I appreciate the team approach you have taken to more fully understand a complex issue. The issue is an excellent example of how "interdependent" we are. If we can provide any more information, please do not hesitate to call. Cove Me David F. Morse Attachment JAISOSY iY 834) 2 ~ _ 36 ie | U