As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW TAXIED OUT FROM THE RAMP AND PERFORMED PREFLIGHT CHECKLIST, CHECKING THE THRUST REVERSER SYS. THE THRUST REVERSER WAS DEPLOYED AND THE RT UPPER PIVOT DOOR ACTUATOR FAILED, FRACTURED. THE DOOR OVERTRAVELED AND AS A RESULT CAUSED DAMAGE TO THE REVERSER. UPON REMOVAL OF THE ACTUATOR IT WAS NOTED THAT THE END ROD CLEVIS BUSHING AND ATTACHING PIN WERE CORRODED AND SEIZED.