WHILE LANDING ON RUNWAY 26, DURING GUSTY CROSS-WIND CONDITIONS, THE AIRCRAFT SWERVED CAUSING THE RIGHT MAIN GEAR TO COLLAPSE. THIS RESULTED IN ADDITIONAL DAMAGE TO THE RIGHT WING AND PROPELLER. THE LOCAL ATIS REPORTED SURFACE WINDS TO BE FROM 210 DEGREES AT 16 GUSTING TO 21 KNOTS AT THE TIME OF THE ACCIDENT.