On July 24, 2002, a Cessna 402B (registration N22PB) was involved in an aviation accident near St. Louis, MO. Investigators recorded the probable cause as: The landing gear collapsed for undetermined reasons. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
The left main landing gear of an airplane collapsed while taxiing after a normal landing, causing a propeller strike. Investigation revealed two sheared bolts in the landing gear assembly.
Incident Overview
After a normal landing, the pilot reported that all three landing gear indicators showed green lights. The airplane taxied approximately 2,000 feet before initiating a right turn onto a taxiway, at which point the left main landing gear collapsed. The propeller subsequently struck the runway surface, and the aircraft came to rest about 120 feet from the point of impact.
Inspection Findings
An examination of the left main landing gear system identified two sheared bolts as the only visible damage. The sheared bolts were an AN25-38A bolt that attached the rod end of the bellcrank to the lower side brace, and a NAS464P4-26 bolt that secured the upper portion of the bellcrank to the upper barrel. The right main landing gear was operationally checked and found to function normally, but the left landing gear could not be tested due to the damage.
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