Japan Airlines Flight 1628 UFO Encounter

The Encounter

On the evening of November 17, 1986, Captain Kenji Terauchi, first officer Takanori Tamefuji, and flight engineer Yoshie Tsukuba were piloting Japan Airlines Flight 1628, a Boeing 747-200F cargo aircraft carrying Beaujolais wine from Paris to Narita Airport near Tokyo. At approximately 17:11 local time, as the aircraft was en route at 35,000 feet in airspace near Anchorage, Terauchi observed two unidentified objects suddenly rise from below and move to flank the aircraft on both sides. Over the next 31 minutes, he reported witnessing what he described as "two small ships and the mothership"—objects allegedly larger than aircraft carriers, configured with rectangular arrays of glowing nozzles or thrusters. The captain reported the objects' cabin illuminated the 747, and he could feel heat radiating from them.

Terauchi immediately notified Anchorage Air Traffic Control (ARTCC), initiating a chain of events that brought military radar stations into the picture. When advised to take evasive action, he lowered the aircraft's altitude and initiated a descending spiral. The objects reportedly maintained position relative to the 747 throughout, staying visible for over 400 miles of flight path before eventually breaking off as the aircraft approached Anchorage.

Radar and Ground Corroboration

What initially distinguished this sighting was not merely eyewitness testimony but apparent radar confirmation. The 747's onboard weather radar clearly painted a green, cloud-like target approximately 7–8 miles away—precisely where the crew visually observed the objects. FAA controllers at Anchorage Center, when queried, initially reported radar contacts matching the JAL flight's position. U.S. Air Force radar at Elmendorf Air Base (adjacent to Anchorage) was directed to scan the area and registered what appeared to be a primary radar return (raw echo without transponder signal) in the vicinity of Flight 1628, though it proved intermittent and difficult to maintain lock.

However, the radar picture quickly became muddied. Contemporaneous military radar imagery was later reinterpreted as clutter rather than a genuine target. FAA controllers' radar displays were similarly reexamined: objects appearing near JAL 1628 on their screens were attributed to "split-image" artifacts—known radar anomalies in that geometry and airspace. Critically, two other nearby aircraft—a United Airlines cargo jet and a USAF C-130 Hercules—were asked to visually search for the objects but reported seeing only Flight 1628 itself.

Official Investigation and Skeptical Explanations

The FAA formally investigated the incident, and the case became a centerpiece of debate within the UFO research community. Skeptical investigator Phillip J. Klass proposed a conventional explanation: Terauchi had mistaken the planets Jupiter and Mars for spacecraft. Jupiter, visible at approximately 10 degrees above the horizon at the time and location, combined with viewing angle and atmospheric refraction, could have created an optical illusion consistent with Terauchi's description. Additionally, Klass and others noted that Terauchi had a history of UFO sightings both before and after this encounter—subsequent reports were traced to lights from small villages, raising questions about his observational reliability.

The FAA ultimately characterized Terauchi as a "UFO repeater"—an individual prone to misinterpreting mundane phenomena as anomalous—though it stopped short of declaring the Flight 1628 case definitively explained. Terauchi stood by his account, maintaining that what the crew witnessed did not match the characteristics of known celestial bodies or aircraft.

Credibility and Legacy

The incident remains one of aviation's most documented yet contentious UFO claims. Its strength rests on the credibility of commercial pilots and crew trained to observe the sky, plus multi-source radar inputs. Its weakness lies in the absence of independent visual confirmation from nearby aircraft, the retroactive dismissal of military and civilian radar data as instrumental artifacts, and the skeptical theory plausibly accounting for the sighting. No physical evidence was recovered. The case exemplifies how even high-credibility witnesses and technological corroboration can yield interpretations that range from genuine anomaly to misidentification.