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The student was being instructed in crosswind techniques, and several circuits and landings had been completed without incident. On the final circuit a normal approach and touchdown were made, but during the landing roll the right wing lowered and the aircraft swung through 90 degrees. Initial inspection found that the lower torque link bolt on the right gear had failed, allowing the wheel assembly to detach. Engineering investigation revealed that the torque link bolt was of defective manufacture in that stress raisers existed near the thread root. This condition resulted in a slow progressive fatigue fracture originating from the stress raisers. There is no inspection requirement for this bolt and the defect is considered an isolated case.

Download Final Report
[ Download PDF: 22KB]
General details
Date: 31 March 1987 Investigation status: Completed 
Time: 1010  
Location:Swan Hill Investigation type: Occurrence Investigation 
State: Victoria  
Release date: 29 October 1987  
Report status: Final Occurrence category: Accident 
 Highest injury level: None 
Aircraft details
Aircraft manufacturer: Piper Aircraft Corp 
Aircraft model: PA-28 
Aircraft registration: VH-PBR 
Type of operation: Flying Training 
Damage to aircraft: Substantial 
Departure point:Swan Hill VIC
Departure time:1010
Destination:Swan Hill VIC
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