NTSB Identification: ATL04LA092.
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Accident occurred Thursday, April 08, 2004 in Greenville, SC
Probable Cause Approval Date: 04/28/2005
Aircraft: Cessna 140, registration: N527ST
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 pilot was cleared to land and went through his approach check with everything normal. The airplane crossed over the landing threshold and settled onto the runway in a three point landing attitude. During the landing roll, the pilot felt the left wing start to dip and the airplane vibrating. The airplane turned approximately 20-degrees to the right, the left front side struck the runway and the airplane came to a stop. The pilot had completed a series of touch and go landings, and during the accident landing, the leaf spring landing gear assembly broke. Examination revealed that the leaf spring gear strut fracture stemmed from an area of fatigue cracking that initiated at the upper forward side of the inboard hole for the step attachment bolts. Given the observed corrosion in the bolt hole, it was determined that the fatigue originated from corrosion pitting. For fatigue to initiate at the upper side of the spring strut, the upper side must have been placed in tension. According to the aircraft maintenance logbook for the 1946 built airplane, the leaf spring gear assembly and the total airframe time was 3,375 hours.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: Fatigue failure of the leaf spring gear strut. Full narrative available
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