first seen from http://mil.news.sina.com.cn/
F-15 Eagle accident report
released
1/10/2008 - LANGLEY AIR FORCE BASE, Va. (AFPN) -- A failure of
the upper right longeron, a critical support structure in the F-15C
Eagle, caused the crash of a Missouri Air National Guard F-15C,
four miles south-southeast of Boss, Missouri, Nov 2.
According to the Air Combat Command Accident Investigation Board
report released Jan. 10, a technical analysis of the recovered
F-15C wreckage determined that the longeron didn't meet blueprint
specifications. This defect led to a series of fatigue cracks in
the right upper longeron. These cracks expanded under life cycle
stress, causing the longeron to fail, which initiated a
catastrophic failure of the remaining support structures and led to
the aircraft breaking apart in flight. ..
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