Transcontinental and Western Air Flight 599 was a Fokker F.10 Trimotor en route from Kansas City, Missouri, to Los Angeles, California, on March 31, 1931. It crashed ten miles south of Cottonwood Falls, Kansas; all eight on board died. One of those killed was Knute Rockne, the head football coach at the University of Notre Dame, who was on his way to Los Angeles for the film "The Spirit of Notre Dame".
It is often claimed that Flight 599 went down in or shortly after a thunderstorm. However, meteorological records show that there was no significant convective activity at the time. The accident was actually caused by the composition of the aircraft. Fokker Trimotors were manufactured out of wood laminate; in this instance, moisture had leaked into the interior of one wing over a period of time and had weakened the glue bonding the structural members (called struts or spars) that prevented the wing from fluttering in flight. One spar finally failed; the wing developed uncontrolled flutter and separated from the aircraft.