The 1986 Japan Airlines Flight 1628 Incident: Analysis of Multi-Sensor Military and Civilian Observations

Overview of the Encounter

On November 17, 1986, Japan Airlines Flight 1628, a Boeing 747 cargo aircraft, was flying over eastern Alaska when the crew encountered three unidentified aerial phenomena (UAP). The pilot, Captain Kenju Terauchi, reported observing two smaller objects that appeared to be maneuvering in tandem with his aircraft, followed by a massive, disc-shaped object that appeared to be twice the size of an aircraft carrier. The encounter lasted approximately 50 minutes, during which the objects displayed extraordinary flight characteristics, including rapid acceleration and sudden changes in altitude that defied conventional aeronautical capabilities of the era.

Investigative Documentation

The incident remains one of the most significant cases in aviation history due to the corroboration provided by multiple sensor systems. While the Federal Aviation Administration (FAA) initially investigated the report, the involvement of the North American Aerospace Defense Command (NORAD) and the subsequent analysis of radar data confirmed that unidentified targets were indeed present in the vicinity of the JAL flight. The Black Vault has archived extensive documentation regarding this case, highlighting the discrepancies between official government explanations—which often attributed such sightings to atmospheric phenomena or sensor errors—and the detailed, consistent testimony provided by the experienced flight crew. The case serves as a cornerstone for researchers studying the intersection of civilian aviation safety and the persistent presence of anomalous objects in restricted or monitored airspace, as detailed in the comprehensive case files maintained by The Black Vault.