As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR COLLAPSED DURING ROLLOUT AFTER LANDING. UPON INSPECTION IT WAS NOTED THAT A BOLT CONNECTING THE DOWNLOCK BELLCRANK TO THE UPPER STRUT ASSEMBLY HAD FAILED. THE BOLT HEAD WAS MISSING ALLOWING ALL OF THE FORCE FROM THE BELLCRANK TO BE APPLIED DIRECTLY AND ENTIRELY TO THE FORWARD ATTACH LUG ON THE UPPER STRUT CAUSING THE LUG TO BREAK AND THE GEAR TO COLLAPSE. MAINTENANCE RECOMMENDS TIME CHANGE ON BOLT AND AN NDT INSPECTION OF LUGS AND SURROUNDING AREA AT THE SAME TIME.