Incident Details
A Cessna 210 departed Thermal, California for a local flight intended to functionally test the landing gear system, following a previous problem. During the flight, the landing gear retracted normally. However, when the pilot attempted to lower the landing gear, the nose gear failed to extend. After multiple attempts, the pilot executed a soft field landing with the landing gear retracted.
Investigation Findings
Examination of the nose gear assembly revealed that the uplock mechanism had twisted from its original position. This twisting occurred due to an elongated bolt hole, which resulted from previous maintenance activities.