As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ONT-PHX - FLT 1530 - ON APPROACH, ACFT EXPERIENCED UNCOMMANDED SMALL RUDDER MOVEMENTS. ACFT LANDED WITHOUT FURTHER PROBLEMS. MX PERFORMED RUDDER PCU INTERNAL LEAKAGE CHECK. ALL TESTS PASSED IAW AWA TASK CARD A8M27001. ACFT RETURNED TO SERVICE. (W)