Japan Airlines Flight 1628: The 1986 UFO Encounter Over Alaska

It was just after 5 p.m. over the frozen dark of eastern Alaska, and Captain Kenju Terauchi was looking at two sets of lights that should not have been there. They had risen from below his Boeing 747, swung in front of the cockpit, and now they paced him — matching his speed, holding station off his nose like a pair of escorts. Then something far larger drifted out of the night behind them. The veteran pilot, a former fighter jock with more than 10,000 hours in the air, reached for the only comparison big enough. It was, he later said, the size of an aircraft carrier. For nearly the next hour, on the evening of November 17, 1986, a cargo jet full of Beaujolais wine flew across Alaska being shadowed by something nobody has ever explained.

The Documented Facts

This is not a campfire story. It is one of the best-documented UFO cases on record, because professionals were watching the sky and the radar at the same time.

The aircraft was Japan Air Lines Cargo Flight 1628, a Boeing 747-200F flying from Paris to Tokyo with a stop in Anchorage, carrying French wine. The encounter began at 17:11 local time on November 17, 1986, while the jet cruised at 35,000 feet near Fort Yukon, Alaska (Wikipedia). In the cockpit were three crew: Captain Kenju Terauchi, First Officer Takanori Tamefuji, and Flight Engineer Yoshio Tsukuba (Enigma Labs).

What did they see? Terauchi described two small lighted objects that closed in and paced the plane, then a much larger craft he called "the mother ship" — a giant, walnut-shaped object with a rim around its middle and flashing colored lights (The Debrief; Enigma Labs). When the small objects were closest, he said the cabin lit up and he could feel their heat on his face (The Debrief). The other two crew were more guarded: from their seats they could make out "lights" that did not look like town lights, but they could not resolve any solid craft (The Debrief).

Here is the part that lifts this case above the ordinary. The crew was not alone in noticing something. Anchorage air traffic control acknowledged seeing a return near the JAL flight on FAA radar, and for a stretch the encounter was tracked on multiple scopes (Wikipedia). The whole episode unfolded over roughly 50 minutes and several hundred miles as the jet flew on toward Anchorage (Enigma Labs).

And it got a real federal paper trail. John Callahan, then the FAA's Division Chief of the Accidents and Investigations Branch in Washington, pulled the radar data and the air traffic control tapes. By his account, in early 1987 the FAA administrator arranged a briefing for representatives of the CIA, the FBI, and members of President Reagan's scientific staff — after which, Callahan said, the officials told the room: "This never took place. We never had this meeting, and this was never recorded" (Enigma Labs). Callahan says he kept the original files, and decades later the raw FAA records were released to the public (Internet Archive — FAA JAL 1628 Records).

The Genuine Open Question

Strip away the noise and one honest puzzle remains: what made the radar returns, and what were three sober airline professionals actually looking at for the better part of an hour?

The FAA never landed on "spaceship." Its public position was modest — the agency said it lacked the resources and the mandate to investigate UFOs at all (The Debrief). On the radar question, the agency's own story shifted: it first acknowledged a return, then leaned toward the idea that the extra blips were a "split image" or an uncorrelated ghost target — a known radar artifact — rather than a solid craft (Wikipedia). Two aircraft vectored toward the scene, a United Airlines flight and a U.S. Air Force C-130, reported seeing nothing but the JAL jet itself (Wikipedia).

So the case sits in a genuinely uncomfortable middle. The visual sighting is hard to dismiss because the lead witness was a highly experienced pilot. The radar evidence is hard to confirm because the returns were ambiguous and never independently corroborated by the nearby aircraft. The official verdict amounts to "unidentified" — not because anyone proved it was alien, but because no single ordinary explanation cleanly accounts for everything at once.

Theories and Interpretations

Here is where we draw the line clearly between what is documented and what is guesswork. Everything below is interpretation, not fact.

The astronomical explanation (best supported, skeptic favorite). Veteran UFO investigator Philip J. Klass argued the bright objects were ordinary sky. In his analysis, the two small lights were "bright stars peeking through sporadic cloud cover," and the looming mother ship was "probably the planet Jupiter," with Mars also in roughly the same patch of sky (The Debrief). Crucially, Klass noted Jupiter was sitting low — about 10 degrees above the horizon — which can make a planet look like it is hovering out at the plane's own altitude (Wikipedia). Astronomer Robert Sheaffer added that Terauchi was not "an unbiased or objective observer," and the FAA itself described him as a "UFO repeater" who reported several other sightings before and after (Wikipedia). Plausibility: high for the lights; this is the leading conventional answer.

The radar-artifact explanation (well supported). On the electronics side, skeptics point out that the extra returns were most consistent with a split image or an uncorrelated primary/beacon target — a ghost blip — and that the nearby aircraft saw nothing, which is exactly what you would expect if there was no physical craft (The Debrief; Wikipedia). Plausibility: high, and it pairs naturally with the planets-and-stars reading.

The "contradiction" critique (a caution, not a craft). Skeptics also note Terauchi's accounts drifted over time — for instance, telling controllers he lost sight of the object after a turn, but later saying it stayed with him (Wikipedia). That does not prove the planets theory; it simply warns that even an expert's memory of a stressful night can stretch. Plausibility: a fair note on the evidence, not an explanation in itself.

The extraterrestrial / cover-up theory (unproven speculation). This is the version that made JAL 1628 famous: a true alien mothership, escorted by smaller craft, deliberately concealed by a CIA that "disappeared" the evidence. The honest assessment is that there is no proof of an extraterrestrial vehicle, and no public smoking-gun document confirming a deliberate cover-up. What exists is Callahan's compelling first-hand testimony about the closed-door briefing (Enigma Labs) — striking, but not the same thing as evidence that the lights themselves were alien. Treat this firmly as unverified. It is the most thrilling reading and the least supported.

The frustrating, fascinating bottom line: the conventional explanations cover most of what happened, yet the case refuses to close completely, because a credentialed pilot and a federal investigator both walked away convinced something genuinely strange had occurred.

Sources & Further Reading

• Japan Air Lines Cargo Flight 1628 — Wikipedia
• What Really Happened to Japan Airlines Flight 1628 in 1986? — The Debrief
• Airline Crew Encounters UAP Over Alaska — Enigma Labs
• FAA Japan Air Lines Flight 1628 Records — Internet Archive
• JAL 1628: Capt. Terauchi's Marvelous "Spaceship" (Philip J. Klass) — Skeptical Inquirer

Skeptics say planets, believers say spacecraft — but notice what both sides quietly agree on: a senior government investigator insists a meeting about this flight was scrubbed from the record. When the people tasked with explaining the sky start telling each other a briefing "never happened," the real mystery may not be what was in the air that night, but what landed in a filing cabinet afterward — and how many other cases are sitting in the same drawer.