Incident Overview
A pilot reported that a fairly loud sound was noted as the landing gear locked in the up position. Subsequently, the pilot was unable to extend the landing gear using either the normal or emergency systems. Attempts to use the normal system resulted in the circuit breaker popping each time. The emergency gear handcrank would not engage to allow manual extension. The aircraft was landed with the gear retracted.
Investigation Findings
An investigation revealed that a bushing, part number 35-810077-3, in the landing gear actuator had failed. This failure allowed a worm gear in the actuator to move and jam the reduction gear. The jammed reduction gear also prevented the handcrank from engaging, making manual extension impossible.
Outcome
Due to the inability to extend the landing gear, the aircraft was landed with the gear retracted. No additional details about injuries, aircraft damage, or other factors were provided in the source.