As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ATB:DUE TO MEDIUM/LIGHT VIBRATION IN RUDDER PEDALS. FLIGHT CONTROL VALVES OFF BY 1. YAW DAMPER OFF NO HELP, A/P OFF NO CHANGES. FOUND UPPER RUDDER HYD RETRACT LINE "B" NUT AND UNION LOOSE BY 2.5 TURN WITH HEAVY LEAK. TIGHTEN BACK IAW MM 27-21-15 OPS AND LEAK CHECK SATIS.TRANSFERED A/C TO HKG WHERE MAINTENANCE PERFORMED BOEING RECOMENDED CHECKS, FOUND LOWER RUDDER POWER CONTROL UNIT BEARING WORN, REPLACED PCU OPS CHECK OK.