As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) THE FWD LOWEST HORIZONTAL RIVET ATTACHING THE RT WING INBD FLAP RAIL (PN 0523231-13) WAS FOUND TO BE SHEARED DURING INSPECTION. WITH SLIGHT UPWARDS PRESSURE ON THE FLAP, WITNESSED THE RIVET HEAD FLEX IN AN ABNORMAL WAY WITH SLIGHT MOVEMENT AND SHOWING SIGNS OF BLACK FRETTING JUST UNDER AND SLIGHTLY AROUND THE RIVET HEAD, RIVET FOUND TO BE COMPLETELY SHEARED.