flygcforum.com - On Monday, August 12, 1985, the Boeing 747-146SR that made this route, registered JA8119, suffered mechanical failures 12 minutes into the flight and 32 minutes later crashed into two ridges of Mount Takamagahara in Ueno, Gunma Prefecture, 100 kilometers (62 mi) from Tokyo.
The crash of Japan Airlines Flight 123, on August 12, 1985 is the single-aircraft disaster with the highest number of fatalities: 520 died on board. The aircraft suffered an explosive decompression from an incorrectly repaired aft pressure bulkhead, which failed in mid flight, destroying most of its vertical stabilizer, severing all of the hydraulic lines, making the 747 virtually uncontrollable. Pilots were able to keep the plane flying for half an hour before crashing into a mountain.
Gunma, Japan Children release lanterns in the river to offer prayers for the victims of Japan Airlines flight 123 on the eve of the 30th anniversary of the accident. Hundreds of people are expected to attend ceremonies commemorating the plane crash, which killed 520 people on board – the deadliest single-aircraft disaster in history Photograph: Jiji Press/AFP/Getty Images