As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CENTER HYD LOW LEAK TRACED TO LT YAW DAMPER SERVO ACTUATOR P/N REQUIRED 1536600-7, LEAY SERVO S/N 1979. A/C DISP IAW MEL 22-21-01 CAT C. C HYD SYSTEM SERVICED TO FULL WITH 6 GALLONS. REMOVED AND REPLACED LEFT YAW DAMPER SERVO PER AMM 21-21-02 MANF PN 1540500-9. LEAK CHK AND SERVO TEST GOOD. PER TOPP 40-30-05 ITEM NOT RII MCO AND PLACARD REMOVED.