As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYS - ATB - DURING FLIGHT RECEIVED LOW QTY CTR HYD SYS-IAW QRH TURNED OFF CTR SYS. C HYD QTY DECREASED TO .12 UPON LANDING. REMOVED AND REPLACED PACKING DPI PRESSURE FILTER CTR SYS, OPS AND LEAK CHECK GOOD. RE-SERVICED CTR HYD SYS IAW AMM12-12-01.