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Essay / Research Paper Abstract
3 pages in length. Leaving behind a legacy of being the deadliest accident in aviation history involving a single aircraft, Japan Airlines flight 123 cost no fewer than five hundred twenty-two lives as a direct result of structural failure. The 6:12 pm takeoff from Tokyo International Airport put the airliner twelve minutes late; after approximately twelve minutes in the air and ascending to cruising elevation, a series of events occurred - traced back seven years to faulty repair - that caused the plane to careen into a mountain ridge. Bibliography lists 4 sources.
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3 pages (~225 words per page)
File: LM1_TLCjapan123.rtf
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direct result of structural failure. The 6:12 pm takeoff from Tokyo International Airport put the airliner twelve minutes late; after approximately twelve minutes in the air and ascending to
cruising elevation, a series of events occurred - traced back seven years to faulty repair - that caused the plane to careen into a mountain ridge. Flight 123 did
not have the chance to level itself at cruising altitude before the rear pressure bulkhead stop working, setting off a domino effect that caused a volatile decompression to separate the
airplane from its vertical stabilizer; every one of the four hydraulic systems were detached, rendering the aircraft uncontainable. The only hint of a potential cause of the trouble came
at 6:33 p.m., and it turned out to be misleading. "R5 broken," a crewman reported by radio. "Cabin-pressure drop." The reference was to the right rear door of
the plane through which food and supplies are normally brought into the cabin. The door had not been opened at Haneda before takeoff (Magnuson, 1985, p. 20). Japans
Aircraft Accidents Investigation Commission officially ruled the accident a result of inadequate repair of a tail strike that took place in 1978 whereby the rear pressure bulkhead was damaged.
Failing to extend a single doubler plate (also called a splice plate) over the entire surface of the stress crack - instead using two individual plates - the Boeing engineers
only secured the bulkhead with a single row of rivets on one doubler and two on the other instead of the standard three-row reinforcement in order to maintain resistance to
metal fatigue; this error in structural soundness cost the aircraft seventy percent of its resistance and was a midair catastrophe just waiting to happen (Lisk, 1997). What this speaks to
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