As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING CRUISE THE ACFT REQUIRED FREQUENT RUDDER TRIM CHANGES. AT TIMES IN EXCESS OF 2 UNITS WAS REQUIRED. INVESTIGATION REVEALED THAT THE LOWER RUDDER TORQUE TUBE HAD 2 WORN BEARINGS. THE UPPER AND LOWER BEARINGS WERE REPLACED IAW JIC27-21-45 RAI 10000. THE IPC REF IS 27-21-40-06, FIG 06, ITEMS 200 AND 230.