Japan Airlines Flight 1628 UFO incident

Case dossier

The event unfolded during the Alaska evening of 17 November 1986, although FAA transcripts use 18 November UTC. JAL 1628, a Boeing 747 cargo flight from Reykjavík to Anchorage, was near Fort Yukon at flight level 350 when Terauchi asked Anchorage Center about traffic. At 02:19 UTC he reported white and yellow lights roughly one mile ahead at the same altitude. The controller knew of no aircraft there and treated the report as a possible traffic hazard.

The first post-flight FAA notes record a shared crew account of two changing sets of yellow, amber, and green lights. They also state that all three could see only lights and at no time a craft. Terauchi's later written and recorded accounts supplied the dramatic close luminous objects, perceived heat, and enormous dark walnut- or Saturn-shaped body. Tsukuda recalled the first lights for about ten minutes, could not describe an object's shape, and said the later faint light might have been a distant town. The crew therefore corroborates an unusual-light report, but not every element of the captain's “mothership” narrative.

The ATC record documents active but ambiguous sensor reporting. At 02:25 UTC Terauchi reported an onboard weather-radar return at 11 o'clock and eight miles. Anchorage Center briefly saw an uncertain primary return behind the 747. Elmendorf's Regional Operations Control Center then reported a primary-only return at ten o'clock and eight miles, lost it, later spoke of a “flight of two,” and soon lost the extra track again. Fairbanks Approach reported only JAL 1628. These statements are real contemporaneous records, but their changing bearings and short duration do not establish one target matching the cockpit report.

Anchorage Center approved descent from FL350 to FL310, a heading change, and a 360-degree turn. The transcript records Terauchi losing sight at 02:39, reacquiring a light at 02:44, and reporting no contact at 02:53. United Flight 69 was vectored near the route and saw the JAL 747 against the remaining light but no other traffic. A USAF C-130 also reported no object. These negative checks do not prove that the crew saw nothing, but they limit claims of a large persistent craft plainly accompanying the airliner.

Late-December wire reports turned the case into a “mothership” story, emphasizing Terauchi's size estimate and stating that radar had confirmed the object before the FAA technical review was public. Later retellings often merge every return, the captain's visual account, and former FAA official John Callahan's retrospective testimony into one continuous military-verified track. The contemporary FAA file is more cautious: it preserves intermittent and disputed indications, a completed air-safety inquiry, no authenticated event photograph, and no official finding of an extraordinary vehicle.