What was found
LEFT MAIN GEAR COLLAPSED ON LANDING. PIC ADVISED 3 GREENS ON APPROACH, NORMAL LANDING UNTIL ACFT SETTLED ON GEAR AND LEFT SIDE COLLAPSED. WINDS LIGHT, ACFT PULLED LEFT INTO GRASS AND STRUCK LIGHTS AND POLE. LEFT ENGINE PROP SHOWS CURLED TIPS DUE TO GROUND STRIKE AND SUBSTANTIAL DAMAGE TO LEFT WING. INVESTIGATION FOUND LEFT MAIN GEAR BELLCRANK PIVOT BOLT SHEARED CAUSING THE FAILURE OF THE REAR CLEVIS EAR AT THE BELLCRANK PIVOT AND LOWER CLEVIS EAR OF THE BELLCRANK ARM.