During the landing attempt with a direct left crosswind in the tailwheel-equipped airplane, the pilot reported he heard a pop, and the airplane veered to the right. The pilot attempted to make a correction to the left to maintain airplane control. The pilot felt the empennage lift and the propeller struck the runway. The right main landing gear collapsed, the right wing struck the runway, and the airplane pivoted around the left main landing gear coming to rest on the runway. The airplane sustained substantial damage to the right wing and wing struts. According to a mechanic, postaccident examination revealed fractures to the landing gear structure that were consistent with an abnormal sideload and subsequent ground loop. No other mechanical failures or malfunctions were reported with the airplane that would have precluded normal operation. At the time of the accident, the pilot was landing the airplane on runway 34 with wind from 250° at 12 knots and gusting to 16 knots.