As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT LOST YELLOW SYSTEM HYDROLIC SYSTEM FLUID PERFORMED ECAM ACTION AND COME FOR LOSS OF YELLOW SYSTEM FLUID (YELLOW FLUID VERY LOW)-FOUND UNION 3093GM LEAKING. R/R O-RING IAW AMM 29-13-15. OPS CHECK / LEAK CHECK GOOD. NO FURTHER DEFECTS NOTED