The Walnut over Fort Yukon: The JAL 1628 UAP Encounter Over Alaska, 17 November 1986

At roughly 17:11 Alaska Standard Time on 17 November 1986, Japan Air Lines Cargo Flight 1628 was at flight level 350 over interior Alaska, broadly east-northeast of Fort Yukon, on the Iceland-to-Anchorage leg of a Paris to Tokyo run. The aircraft was a Boeing 747-246F freighter. The crew were professionals: Captain Kenju Terauchi, age 47, with reported flight time in excess of ten thousand hours; First Officer Takanori Tamefuji, age 39; Flight Engineer Yoshio Tsukuba, age 33. The Anchorage leg carried French wine, including Beaujolais.

What Terauchi described began with two pairs of multi-colored lights below and ahead of the 747. Several minutes later a much larger object resolved out of the dark, walnut-shaped or Saturn-shaped in profile, which he estimated as twice the size of an aircraft carrier.

Across the next thirty-two minutes the radar picture was mixed. FAA Anchorage Air Route Traffic Control Center showed intermittent primary returns at positions consistent with the visual. The USAF Elmendorf Regional Operations Control Center, NORAD-tasked for Alaskan airspace, briefly picked up primary-only returns near JAL 1628. Anchorage Tower showed a brief return on approach. The 747’s onboard weather radar, the crew reported, painted an object seven to eight nautical miles ahead. The aircraft descended from FL350 to FL310 and executed a 360-degree turn; the object reportedly stayed with it. At about 17:53 the crew reported the object gone. JAL 1628 landed at Anchorage at 18:20.

On 5 March 1987 the FAA released the data package and said the agency was “unable to support what they saw” as a confirmed second aircraft. In May 2001 John J. Callahan, the FAA Division Chief who oversaw the inquiry, deposed for the Disclosure Project that he had briefed CIA representatives, FBI representatives, and personnel from a Reagan White House scientific study group in the FAA’s Round Room in Washington, and that at the close of the briefing the CIA representatives told him the meeting never happened. The question is what JAL 1628 actually flew alongside that night, and what really happened in that Round Room.

The documented account

The aircraft and the crew

JAL Cargo 1628 was a Boeing 747-246F freighter operating Paris Charles de Gaulle to Tokyo Narita via Keflavik in Iceland and Anchorage in Alaska, with a crew change scheduled at Anchorage. The specific airframe registration flown on 17 November 1986 is not stated in the publicly released FAA file as it currently sits online, and the widely cited registration JA8154 appears in JAL fleet listings as the passenger-variant 747-246B rather than the freighter. The aircraft is best described as a 747-246F freighter with the precise tail number to verify.

The cargo on the Anchorage leg was a load of French wine, and Captain Terauchi himself referred to Beaujolais on the manifest, consistent with the mid-November Beaujolais Nouveau release season. The pallet count is not in the publicly released FAA file inventory, and the often-repeated figure of nine pallets is not corroborated in the sources searched here.

The crew were three: Captain Kenju Terauchi, age 47, a 747 captain with prior military service and substantial flight time; First Officer Takanori Tamefuji, age 39; and Flight Engineer Yoshio Tsukuba, also rendered Tsukuda in some FAA transcripts, age 33. All three signed statements at Anchorage. FAA debriefers characterized the crew at Anchorage as “normal, professional, rational,” with no drug or alcohol involvement.

First contact at about 17:11

The flight was at FL350 across interior Alaska, broadly northeast of Fort Yukon (one investigation account places the initial sighting at roughly 105 miles northeast). Terauchi reported two pairs of multi-colored lights below and ahead of the 747, which he initially read as US military aircraft. The lights paced the 747 for several minutes.

Then, per Terauchi, the configuration changed. A much larger object appeared to resolve behind or above the close-in lights, which reorganized into what he later described as a formation. He sketched the larger shape afterwards and described it as walnut-shaped or Saturn-shaped in profile, estimating it at roughly twice the size of an aircraft carrier. He compared the close-in lights to “the cabin lights of a Boeing 747-Mothership.”

Terauchi also reported that light from the close-in objects illuminated the cockpit and that he could feel warmth on his face, a detail recorded in his signed statement and in “Meeting the Future” as testimony, not instrumental measurement.

The radar picture

Three ground or near-ground radar systems and one airborne radar were reviewed.

FAA Anchorage ARTCC (sector ZAN) secondary radar consistently tracked the 747’s transponder throughout, and showed intermittent primary returns at positions consistent with Terauchi’s reports. The FAA Technical Center on later review characterized at least some of these as an “uncorrelated primary and beacon target” artifact, that is, ghost returns rather than a separate solid contact. There was no sustained locked track.

The USAF Elmendorf ROCC, the NORAD-tasked facility for Alaskan airspace, picked up brief primary-only returns near JAL 1628: a primary at eight nautical miles in the ten o’clock position at about 17:26, contact lost at about 17:27, and at about 17:38 a “flight of two” confirmation. The Air Force subsequently characterized those ROCC hits as likely “split beacon returns” or clutter from the 747’s own transponder.

Anchorage Tower briefly showed a return on its short-range radar during approach.

The 747’s onboard weather radar, per the crew’s contemporaneous radio reports, painted a return seven to eight nautical miles ahead at the position of the object. There is no recovered tape; it is the crew’s reported observation, time-stamped against the ATC transcript.

Maneuvers and disengagement

At 17:19 local Terauchi contacted Anchorage ARTCC asking whether other traffic was in his vicinity. At about 17:25 the crew reported the object on the 747’s onboard weather radar. At 17:32 the 747 was cleared to descend from FL350 to FL310. At 17:36 the crew executed a 360-degree turn; the object, they reported, stayed with the aircraft through the maneuvers.

ARTCC vectored United 69 and a USAF C-130 into the area; both reported visual contact with the JAL 747 and nothing else. The crew of JAL 1628 reported loss of the object at about 17:53 local. The 747 landed at Anchorage at 18:20.

One source stream, the bibliotecapleyades reproduction of the UFO Briefing Document, renders parts of this timeline shifted by roughly one hour, as 18:13 to 18:53 local. The 17:11 to 17:53 window matches the bulk of the FAA release and the contemporaneous wire reporting; the discrepancy is recorded here rather than resolved.

The story breaks and the FAA release

The encounter was not initially public. UPI ran the first detailed account on 30 December 1986, filed by Paul Raeburn; the New York Times followed on 5 January 1987. JAL’s internal response, as Terauchi later described in published interviews and as secondary investigations report, was to reassign him to ground duties after the press attention. He was later returned to active flight status.

The FAA investigation was directed by John J. Callahan, then Division Chief of the Accidents, Evaluations, and Investigations Branch at FAA headquarters. Callahan’s FAA title was later disputed by sceptics including Philip Klass; The UFO Chronicles published documentation in 2015 indicating Klass’s denial was incorrect and that Callahan’s credentials check out.

The FAA held a press briefing in Anchorage on 5 March 1987. Regional Director Paul Steucke affirmed the crew’s professionalism and the accuracy of their reporting, while stating that the agency was “unable to support what they saw” as a confirmed second aircraft. The release was substantial: roughly twenty-three pages of ATC transcripts, crew interview material, controller statements, flight path charts, and more than one hundred and fifty pages of raw radar printouts.

Callahan’s 2001 disclosure

In a deposition recorded on 9 May 2001 for the Disclosure Project, and in subsequent compiled statements, Callahan described what he says happened inside the FAA between the encounter and the public release.

Per Callahan, within roughly a week of the encounter he and his superior, Harvey Safeer, reviewed the radar and audio data at the FAA Technical Center in Atlantic City. FAA Administrator Vice Admiral Donald D. Engen reviewed the material and authorized a follow-up briefing the next day in the FAA’s Round Room in Washington. Per Callahan, that briefing was attended by approximately three CIA representatives, three FBI representatives, and three personnel from a Reagan White House scientific study group, alongside FAA technical staff. Per Callahan, a CIA representative remarked that this was the first instance they had encountered of both aircraft primary radar and ground primary radar confirming a UAP. Per Callahan, at the close of the briefing the CIA representatives stated, in substance, that the meeting “never happened,” that the participants were sworn to secrecy, and that the material was being confiscated. Callahan stated he retained personal copies of radar printouts, plan view display video, voice tapes, and pilot reports, which he later released publicly via the Disclosure Project.

This is the load-bearing caveat. The entire alleged CIA and Reagan White House Scientific Study Group briefing rests on Callahan’s single-source testimony from 2001 onward. No CIA or White House document independently corroborating the briefing has surfaced in the public record. What we have is a documented public statement, made on record by a named former FAA division chief whose FAA credentials have been re-verified. We report it as that. We do not assert in our own voice that the Round Room meeting unfolded exactly as he described.

The evidence

The documentary spine is the FAA’s 5 March 1987 public release: ATC transcripts, controller statements, the three crew’s signed statements, flight path charts, and roughly one hundred and fifty pages of raw radar printouts, now aggregated at The Black Vault. To that is added Terauchi’s signed statement at UFO Evidence, his Japanese-language essay “Meeting the Future” in the Black Vault FAA file set, his 1987 Flying Saucer Review article with his sketches, and the contemporaneous UPI and New York Times reporting.

The instrumental record is the radar. FAA Anchorage ARTCC produced consistent secondary returns from the 747’s transponder plus intermittent uncorrelated primary returns. USAF Elmendorf ROCC produced brief primary-only returns later characterized as split beacon or clutter. Anchorage Tower briefly produced a short-range return on approach. The 747’s onboard weather radar produced, per crew voice reports time-stamped against the ATC tape, a return at seven to eight nautical miles. Two vectored aircraft, United 69 and a USAF C-130, produced no corroborating visual.

Modern scholarship divides cleanly. Bruce Maccabee, optical physicist and CUFOS investigator, divided the encounter into four phases and concluded the first two pacing-light phases were consistent with genuine unidentified traffic. Richard F. Haines and John W. Schuessler treated the case as a credible unidentified pilot sighting. Philip J. Klass (Skeptical Inquirer, 1987) argued planetary misidentification compounded by radar artifact; Robert Sheaffer extended that reading in 2014.

Callahan’s Disclosure Project deposition of 9 May 2001 sits alongside the FAA materials, and is what it is: testimony, not an independently corroborated official record of a second meeting.

Hypotheses and open questions

Each of the following is a hypothesis. None has carried the day.

A genuine unidentified solid object. That a physical craft of unknown origin paced JAL 1628. For: three professional crew assessed as “normal, professional, rational,” a sustained thirty-two-minute visual encounter, corroborating onboard weather radar returns reported in real time, intermittent primary returns at two physically separated ground sites at positions consistent with the visual, and an object that reportedly tracked the 747 through a descent and a 360-degree turn (Maccabee, Haines, Schuessler, and the Sturrock Panel framing sit closest). Against: radar returns were intermittent and never a locked track, the FAA Technical Center characterized at least the ARTCC primaries as uncorrelated artifacts, and the United and C-130 traffic vectored in saw nothing.

Misidentified planets plus ice crystal scattering. That the visual elements were astronomical bodies, principally Jupiter and Mars, with close-in formation effects from ice crystal scattering. For: Klass’s geometric reconstruction places Jupiter at roughly ten degrees elevation on Terauchi’s bearing, and the standard sceptical reading for the secondary January 1987 Terauchi sighting (village lights diffused through ice crystals) was effectively accepted at the time. Against: planets are stationary on the timescale of the maneuvers, do not produce primary radar returns, and the ROCC hits and onboard weather radar return are not accounted for.

Radar sensor artifact across multiple systems. That the radar returns were independent artifacts coincident with a visual misidentification. For: this is the FAA Technical Center’s published reading, and intermittent uncorrelated primaries are a known artifact in the presence of a strong beacon target. Against: contacts appeared on multiple physically separated sites (ARTCC, ROCC, briefly Anchorage Tower) plus the 747’s own weather radar, which are different radar geometries.

A classified US military experimental aircraft. That an unacknowledged US platform was operating over Alaska that night. For: late-1980s US “black” aviation programs are documented (the F-117A reached operational status in 1983 but was not publicly acknowledged until late 1988, and Aurora-type rumors were live), and Alaska is a known classified test corridor. Against: no US military or NORAD acknowledgment has surfaced, and a classified platform would not be expected to actively pace a foreign-flag commercial 747 for thirty-two minutes inside FAA-controlled airspace.

Combined astronomical misidentification and radar artifact. The sceptical synthesis advanced by Klass in 1987 and by Sheaffer in 2014, with crew over-reading via expectation and cockpit lighting. For: it accounts for the discrete elements without invoking an unknown craft. Against: it does not fully account for the separately signed Tamefuji and Tsukuba statements, the contemporaneous onboard weather radar observation, or Callahan’s testimony about FAA-level handling.

Cockpit hallucination or shared illusion. A fatigue or high-latitude visual phenomenon. For: long-haul polar flying can produce visual misperception. Against: ground radar at multiple sites cannot hallucinate.

What remains unknown

The physical nature of the intermittent primary radar returns at the FAA Anchorage ARTCC, the USAF Elmendorf ROCC, and briefly at Anchorage Tower, and whether the agreement of their positions reflects a genuine third object or independent coincident artifacts. Whether the visual and the radar observations are causally correlated. The precise scope, attendance, and contents of the alleged FAA Round Room briefing as Callahan described it, which rests on his single-source testimony from 2001 onward and is not independently corroborated by any released CIA or White House document. Whether NORAD’s internal 1986 to 1987 post-incident review records, beyond what was released through the FAA, are now declassified and in the public domain. The full content of Terauchi’s later Japanese-language testimony and any unpublished JAL internal company records of his post-incident reassignment. Confirmation of the specific 747-246F freighter registration flown on 17 November 1986. Confirmation of the precise cargo manifest, including the pallet count of Beaujolais on the Anchorage leg.