As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
C HYD QTY STATUS MSG AT FL370 1 HOUR FROM LAN DING. FOLLOWED CHC KLIST ISOLATED SYS. .43 RF FOUND RETURN LINE BETWEEN RT CTR PUMP AND EMP CASE DRAIN DUAL FILTER MODULE LOOSE. TIGHTENED FITTING PER AMM 29-00-98. SERVICED SYSTEM TO FULL PER AMM 12-12-01. LEAK CK GOOD. ADD EMP:118592