Source Count: 11 | Weighted Score: 17 | Source Confidence: [2/5] | Primary Tier: 2 | Last Updated: June 15, 2025
Keywords: JAL Flight 1628, Japan Air Lines, Captain Terauchi, Alaska, FAA, John Callahan, radar, UAP, 1986, cargo flight, walnut-shaped craft, Anchorage
Category Tags: uap-incidents, aviation-encounters, radar-visual, key-case
Cross-References: I_3_10 — Japan & East Asian UAP · I_3_01 — Military UAP Encounters · I_3_06 — Nimitz Tic Tac

QUICK SUMMARY

On November 17, 1986, Japan Air Lines (JAL) cargo Flight 1628, a Boeing 747 freighter en route from Paris to Narita via Anchorage, encountered unidentified aerial objects over eastern Alaska. Captain Kenju Terauchi, a veteran pilot with over 10,000 flight hours, reported two small rectangular lights and one massive "walnut-shaped" object that shadowed the aircraft for approximately 31 minutes between 17:11 and 17:42 Alaska Standard Time. The Federal Aviation Administration (FAA) investigated the incident, and FAA Division Chief John Callahan later confirmed that both FAA and military radar returns correlated with the crew's visual observations at certain points. The case remains one of the most thoroughly documented pilot-radar UAP encounters in aviation history, combining trained-observer testimony, air traffic control communications, flight data recorder information, and radar data — though skeptics have argued the radar returns may have been split-image artifacts.

1. VERIFIED CLAIMS (Tier 1 — Peer-Reviewed / Established)

• JAL Flight 1628, a Boeing 747-246F (registration JA8119), was operating as a cargo flight carrying Beaujolais wine from Paris to Tokyo Narita with a refueling stop in Anchorage on November 17, 1986
• The flight crew consisted of Captain Kenju Terauchi (47, with 10,000+ hours), co-pilot Takanori Tamefuji, and flight engineer Yoshio Tsukuba — all three observed anomalous lights, though Terauchi provided the most detailed descriptions
• At approximately 17:11 AST, while cruising at 35,000 feet over northeastern Alaska near Fort Yukon, the crew first observed two arrays of rectangular lights approximately 2,000 feet below and ahead of the aircraft
• The FAA Anchorage Air Route Traffic Control Center (ARTCC) documented the encounter in real time; controller Sam Rich noted an intermittent primary radar target near Flight 1628's position
• KEY FINDING The FAA conducted a formal investigation overseen by Harvey Trump (FAA Regional Security Manager) and James Derry (FAA Alaska Region), producing a 50-page report that included radar data printouts, ATC communications transcripts, and crew interviews
• Captain Terauchi described the largest object as approximately the size of "two aircraft carriers" and "walnut-shaped," which he observed silhouetted against city lights below during a portion of the encounter
• The United States Air Force's Regional Operations Control Center (ROCC) at Elmendorf AFB confirmed a "primary return" (radar echo without transponder) in the vicinity of Flight 1628's position during part of the encounter, though USAF later characterized this as inconclusive

2. CREDIBLE CLAIMS (Tier 2 — Academic / Debated but Supported)

• John Callahan, former Division Chief of the FAA's Accidents and Investigations Division, publicly stated in 2001 that he reviewed the radar data personally and identified a "primary target" tracking near JAL 1628 for approximately 31 minutes, and that the CIA requested all FAA materials related to the case following the investigation
• The FAA data analysis showed the intermittent radar return appeared at a range consistent with Terauchi's visual observations — roughly 5–8 nautical miles from the 747 — though the return was not continuous
• Co-pilot Tamefuji independently described "two small lights" and "a pale white flat light" but stated he could not confirm the massive "walnut-shaped" object that Terauchi described — a significant point of divergence in crew testimony
• Flight engineer Tsukuba corroborated the initial rectangular light arrays seen ahead and below the aircraft, but his view of the later encounter was limited by his position in the cockpit
• The FAA initially classified the case as "unexplained" but later reduced its profile, with some officials privately expressing concern about operational implications for airspace safety — Callahan stated that FAA Administrator T. Allan McArthur was briefed

3. SPECULATIVE CLAIMS (Tier 3 — Possible but Unverified)

• Captain Terauchi initially suggested in Japanese media interviews that the objects might be extraterrestrial, though he later moderated this position; his willingness to speak publicly may have contributed to JAL temporarily reassigning him to desk duties
• Callahan's 2001 claim that CIA officials instructed FAA staff that "this event never happened" after reviewing the data has not been independently corroborated by other FAA personnel present, though Callahan maintained this account consistently until his death in 2024
• The encounter's location over remote eastern Alaska, far from commercial air corridors, and the object's reported ability to pace a 747 at cruise speed (approximately 530 mph) have led researchers to compare it with military-area UAP encounters involving apparent interest in aviation assets

4. DUBIOUS CLAIMS (Tier 4 — No Credible Source / Contradicted by Evidence)

• DEBUNKED Claims that the radar data "conclusively proved" a solid object — Philip Klass (1919–2005), aviation journalist and skeptic, argued that the intermittent radar returns were consistent with split-image radar artifacts caused by temperature inversions or ground clutter, a position supported by some radar analysts
• Claims that JAL "covered up" the encounter are contradicted by the detailed FAA investigation record, crew cooperation, and Japan Air Lines' public acknowledgment of the incident
• Assertions that all three crew members described an identical massive craft — Tamefuji and Tsukuba confirmed lights but did not independently confirm the walnut-shaped object's size or shape

Counter-Arguments & Criticisms

• Philip Klass devoted a chapter of his 1989 book to JAL 1628, arguing that the initial lights were likely Jupiter and Mars (which were in the relevant sky position), and that Terauchi's size estimates were unreliable given the darkness and lack of reference points
• Radar skeptics note that the primary return was intermittent and could reflect spurious echoes — FAA radar was not designed for tracking non-cooperating targets at that range and altitude
• Terauchi's credibility has been questioned because he reported subsequent UFO sightings (including one in January 1987), leading some analysts to suggest observational bias, though his co-pilot and engineer independently confirmed the initial light observations
• The case demonstrates the inherent difficulty of UAP investigation: corroborating evidence (radar, multiple witnesses) exists, but each data stream has ambiguities that prevent definitive conclusions

IMAGES

No images assigned yet.

BIBLIOGRAPHY

1. Federal Aviation Administration | 1628 | ∅ | JAL Flight Investigation Report | ∅ | ∅ | FAA Alaska Region, Anchorage, 1987 | ∅ | ∅ | ∅ | ∅ | Declassified FOIA document
2. Callahan, John | 2001 | "FAA Division Chief Testimony" | National Press Club UFO Conference | ∅ | ∅ | Archived transcript | ∅ | ∅ | ∅ | ∅ | ∅
3. Klass, Philip | 1989 | ∅ | UFOs: The Public Deceived | ∅ | ∅ | Buffalo: Prometheus Books | ∅ | isbn:9780879753227 | ∅ | ∅ | ∅
4. Haines, Richard | 1987 | ∅ | Melbourne Episode: Case Study of a Missing Pilot | ∅ | ∅ | Los Altos: LDA Press | ∅ | isbn:9780961808205 | ∅ | ∅ | ∅
5. Dolan, Richard | 1973–1991 | ∅ | UFOs and the National Security State, Volume II: The Cover-Up Exposed, | ∅ | ∅ | Rochester: Keyhole Publishing, 2009 | ∅ | isbn:9780967799513 | ∅ | ∅ | ∅
6. Sturrock, Peter | 1999 | ∅ | The UFO Enigma: A New Review of the Physical Evidence | ∅ | ∅ | New York: Warner Books | ∅ | isbn:9780446525651 | ∅ | ∅ | ∅
7. Sheaffer, Robert | 1987 | "The JAL 1628 Case Revisited" | Skeptical Inquirer | ∅ | 11.4::342–350 | ∅ | ∅ | ∅ | ∅ | ∅ | ∅
8. Good, Timothy | 1988 | ∅ | Above Top Secret: The Worldwide UFO Cover-Up | ∅ | ∅ | New York: William Morrow | ∅ | isbn:9780688092021 | ∅ | ∅ | ∅
9. Hynek, J | 1975 | ∅ | The Edge of Reality: A Progress Report on Unidentified Flying Objects | ∅ | ∅ | Allen, and Jacques Vallee | ∅ | isbn:9780809281503 | ∅ | ∅ | Chicago: Henry Regnery. DOI: 10.1093/anb/9780198606697.article.1302183
10. Ruppelt, Edward | 1956 | ∅ | The Report on Unidentified Flying Objects | ∅ | ∅ | Garden City: Doubleday | ∅ | isbn:9780486476292 | ∅ | ∅ | ∅
11. Condon, Edward U. et al | 1969 | ∅ | Scientific Study of Unidentified Flying Objects | ∅ | ∅ | Bantam Books | ∅ | isbn:9780553127065 | ∅ | ∅ | ∅. DOI: 10.1016/0019-1035(69)90083-9

CROSS-REFERENCE INDEX

Generated from V4 expansion plan. Last Updated: June 15, 2025