At 1228 Mountain time, the airplane was substantially damaged when the right main landing gear collapsed while landing. Visual conditions prevailed; the Airline Transport pilot and sole occupant was not injured. The flight was the first after the aircrafts annual inspection and the pilot was breaking in a new cylinder. He noted no anomalies during the flight which included an in-flight gear extension and retraction. He said the landing was uneventful. While taxiing back to the hangar, the right main landing gear collapsed and the right wing struck the ground. Post-accident inspection revealed a bolt attached to the lower portion of the bell crank was sheared and the main landing gear trunion was broken.