I'm Takahiro Jikusen, an aviation history researcher. Regarding the investigation of the cause of the Japan Air Lines Flight 123 Mt. Osutaka crash, the survey results were divided into three chapters under the theme of "Wings of Silence" This time, I will re-edit it into a omnibus in response to your request, and review the process leading to the accident again while adding materials that I could not tell you.

Many people pointed out the inconsistencies in the accident investigation report, but could not provide a definitive alternative. It was when I realized the role of the marbles in the remonade bottle that I got the alternative and was convinced of the rationality. The jumbo airliner looked like a complex and huge mecha, and there was a clue to clarify the cause in a vial nearby.

I withheld the theory that the pressure bulkhead was destroyed due to a mistake in repairing the pressure bulkhead by Boeing. I have come to the conclusion that I can be confident that the cause is the metal fatigue of the pressure bulkhead mounting part caused by the aircraft characteristics peculiar to the jumbo aircraft and the problem of JAL's aircraft operation.

The omnibus will tell you the following 5 contents in order. Five points of failure analysis, Basic hurdles that block the thinking of failure analysts, Mysterious reports and commentary, The speculation of the USA and Japan, and Technical examination results in order. I will proceed.

It will be a little longer omnibus, so I would appreciate it if you could take a break from time to time and compare the report of the accident investigation report with the Jikusen theory.

First, I will introduce the abbreviations used in the omnibus. The time when the abnormality occurred over Sagami Bay is called "Time Zero", and the crashed aircraft is called "JA8119". The Accident Investigation Commission and the Aircraft Accident Investigation Report are called "Accident Investigation" and "Report", respectively.

The B747's international flight equipment is called "LR aircraft" from long range, and the domestic flight equipment is called "SR aircraft" for short range. JA8119 is an SR machine.

At first, the main items related to the JA8119 crash are shown in a chronological table. The cause of the crash should exist in about 11 years and 6 months from the manufacture of the aircraft in January 1974 to the time zero.
While many of the books involved in this accident are interested in Time Zero and its later events, "Wings of Silence" basically focuses on the events up to Time Zero and analyzes them technically.

I would like to look back on this chronology at each milestone. Please pay attention to the stop motion as well as the "accident factor linkage diagram" that appears at the end.