As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT AT 14000 AND AGAIN AT 16000 FT THE RUDDER KICKED LEFT WITHOUT PILOT INPUT. OCCURRED AGAIN AT FL370 APPROX 30 MINUTES LATER. AUTOPILOT DID NOT DISENGAGE<[01] REMOVED AND REPLACED MAIN RUDDER PCU PER AMM 27-21-91. ALL OPS CHECKS NORMAL.;[02] REMOVED AND REPLACED MAIN RUDDER PCU PER AMM 27-21-91. ALL OPS CHECKS NORMAL.