At 11:25 mountain time, a Cessna 177RG was damaged during landing at Broomfield-Jefferson County (Jeffco) Airport. The pilot and his passenger were not injured. The pilot said he heard a loud pop and noticed the landing gear unsafe light was illuminated. The main landing gear was partially extended and could not be fully extended or retracted. The pilot eventually landed on runway 29L at Jeffco, where the nose gear held and the main gear collapsed. Initial examination of the airplane indicated the high pressure up hose failed. The airplane was in compliance with an AD that addresses this problem.