As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - IN CRUISE @ FL380 ECAM HYD Y RSVR LO LVL HYD Y SYS LO PR ECAM ACTIONS FOLLOWED. YELLOW HYD QUANTITY INDICATING EMPTY. FOUND YELLOW HP MANIFOLD- SUPPLY CHECK VALVE LEAKING. REPLACED O-RING PER AMM 29-13-53-000-813-A. OPS AND LEAK CHECK GOOD. PERFORMED ENG #2 ENGINE RUN. OPS CHECK OF YELLOW EDP GOOD. NOTED BY MX, YELLOW RESERVOIR STILL HAD FLUID AND SYSTEM DID NOT CAVITATE. OK FOR SVC.