Flight 1628 UFO Encounter Over Alaska

On November 17, 1986, a Japanese Boeing 174-200F cargo aircraft, Japan Airlines (JAL) Flight 1628, was flying through the mysterious Alaska Triangle and just over Anchorage on its return from Paris. The crew included Captain Kenju Terauchi, an ex-fighter pilot with more than 10,000 hours flight experience; co-pilot 1st Officer Takanori Tamefuji; and flight engineer Yoshio Tsukuba.

At 17:11, while flying at 35,000 feet, Captain Terauchi noticed what appeared to be the presence of some additional traffic in his vicinity. At first, he thought the lights were military jets on a special mission, since they were so close to the area. However, when the lights had not changed course, he realized they were something else; something that would continue to follow them for about 400 miles.
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Suddenly, the crew encountered two UFOs to their left. One of the objects appeared to be twice the size of the aircraft, while the other was smaller. They also reported seeing flashing lights following the plane. Captain Terauchi described them as flying as if there was no such thing as gravity. They would speed up quickly, stop, and then fly at the plane's speed. The next instance, they changed course as though they had overcome gravity, which was impossible for a normal plane to do.

At 1719, Captain Terauchi notified Anchorage air traffic control. At this point, the UFOs were being tracked on both military and civilian radar and verified by a high-level administrator in the Federal Aviation Administration (FAA). In an attempt to elude the UFOs, the pilot requested permission from the ground crew to fly at a lower altitude and drop 4,000 feet. However, even after making several attempts, he could not elude them. Upon flying over Fairbanks, the city lights helped illuminate the object, to which he referred to as the "Mother Ship." The encounter continued to last about 50 minutes before the UFO suddenly disappeared. 

Detailed reports by the military controller indicated that the UFOs had been traveling thousands of miles per hour as they maneuvered in the airspace around JAL 1628.