On July 24, 1995, at 1336 mountain daylight time, a Gulfstream Aerospace GV-1, N480UP, sustained substantial damage on landing at Centennial Airport, Englewood, Colorado, when part of the left main landing gear penetrated the wing during landing/taxi. The two crew members and seven passengers were not injured. Visual meteorological conditions prevailed and an IFR flight plan was filed for this business flight which originated in Allentown, Pennsylvania (PA). According to the crew, the flight from Allentown, PA to their destination was uneventful. They were given a visual approach to runway 33 at Centennial Airport and the landing and taxi appeared normal; however, they noted a slight list to the left during taxi. The aircraft was parked at the AMR Combs passenger facility and the passengers disembarked normally. During post flight, the crew found damage to the left main landing gear assembly. Items incurring damage were the tires, shock strut, cables/wiring, left gear fairing box, and door fairing. It was found that the left shock strut had penetrated the gear fairing box aft of the gear well. The left strut and right knuckle and pins were tested at the facilities of Applied Technical Services, Incorporated, Marietta, Georgia. Their report is attached and states that the most likely failure scenario is that the through bolt loosened and the pin fell out allowing the strut to move abnormal to its design function. The left knuckle and pins were not recovered. A copy of the Applied Technical Services report was forwarded to the Board's Materials Laboratory for review. The review concurred with the report.