NTSB Identification: ANC05LA142.
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Accident occurred Friday, September 09, 2005 in Pilot Point, AK
Probable Cause Approval Date: 06/28/2006
Aircraft: Cessna 185E, registration: N1592F
Injuries: 1 Uninjured.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
The airline transport certificated pilot was conducting a personal cross-country flight. He said during landing at a sod covered, off airport site, the left main landing gear collapsed. Upon inspection, he discovered that the left main landing gear strut attachment bolt had broken. He reported that a witness told him he initially bounced 12-18 inches on landing before settling onto the landing area a second time. The pilot said there were no known mechanical anomalies with the airplane prior to the accident. The airplane sustained structural damage to the gear box, left wing, aileron, and horizontal stabilizer. An examination of the landing gear attachment bolt, and new, exemplar bolts, by a metallurgist at the NTSB materials laboratory in Washington, D.C., revealed that the bolt had broken in a "ductile overstress separation in bending and shear mode." The laboratory report notes that the bolt was made of the appropriate material, and was of the proper dimensions.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot's misjudged landing flare, which resulted in a hard landing and an overload failure of the main landing gear during the landing touchdown. Full narrative available
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