What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
After speaking with the PIC at the time of the incident, the landing was normal to include the mains touching down and transition to the nose wheel. Shortly after touchdown (within 5 seconds or so), the PIC noticed the right wing dipping and then felt the impact with the runway on the right side. This caused the aircraft to veer off the runway into the terrain (dirt) adjacent. The aircraft came to a stop and the realization that the right main gear had collapsed became apparent. Further examination of the right main gear identified a few failed parts: (1) bolt NAS464P4-26 holding the bellcrank onto the upper gear structure sheered at the bolt head, and (2) bellcrank p/n 0841110-2 mounting holes broke free and missing.
As the FAA filed it
AFTER SPEAKING WITH THE PIC AT THE TIME OF THE INCIDENT, THE LANDING WAS NORMAL TO INCLUDE THE MAINS TOUCHING DOWN AND TRANSITION TO THE NOSE WHEEL. SHORTLY AFTER TOUCHDOWN (WITHIN 5 SECONDS OR SO), THE PIC NOTICED THE RIGHT WING DIPPING AND THEN FELT THE IMPACT WITH THE RUNWAY ON THE RIGHT SIDE. THIS CAUSED THE AIRCRAFT TO VEER OFF THE RUNWAY INTO THE TERRAIN (DIRT) ADJACENT. THE AIRCRAFT CAME TO A STOP AND THE REALIZATION THAT THE RIGHT MAIN GEAR HAD COLLAPSED BECAME APPARENT. FURTHER EXAMINATION OF THE RIGHT MAIN GEAR IDENTIFIED A FEW FAILED PARTS: (1) BOLT NAS464P4-26 HOLDING THE BELLCRANK ONTO THE UPPER GEAR STRUCTURE SHEERED AT THE BOLT HEAD, AND (2) BELLCRANK P/N 0841110-2 MOUNTING HOLES BROKE FREE AND MISSING.