On August 27, 2015, about 1405 mountain standard time, a Cirrus SR22, N915TD, experienced a nose landing gear collapse during landing roll at Scottsdale Airport (SDL), Scottsdale, Arizona. The certified flight instructor (CFI), the pilot receiving instruction, and one passenger were not injured. The airplane received minor damage. The airplane was registered to ESPBC LLC of Scottsdale, and operated by Scottsdale Executive Flight Training as a 14 Code of Federal Regulations Part 91 instructional cross-country flight. Visual meteorological conditions prevailed, and a flight plan was not filed. The flight originated from Flagstaff, Arizona about 1300, and was destined for SDL.
According to the CFI, the pilot receiving instruction made the landing. The main landing gear touched down first, and slowly the nose gear was lowered onto the runway's surface. The CFI reported that at this time they felt a shimmy in the nose gear, during which the pilot receiving instruction applied back pressure on the stick to lift the weight off the nose gear. As the nose gear came down a second time, it appeared that the shimmy had stopped, and that they were level on all three wheels. However, after a few seconds the nose slowly started falling forward until it had completely collapsed.
The nose landing gear consists of a main strut tube and two gusset tubes near the top portion of the main strut tube. The landing gear was observed fractured through the strut tube adjacent to the forward edge of the gusset tube attachment welds.
The National Transportation Safety Board Materials Laboratory examined the nose landing gear strut and determined that the failure of the landing gear was the result of high stress fatigue cracking due to sideways bending from one side. No mechanical or metallurgical anomalies were noted with the landing gear.