As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ECAM CAUTION MESSAGE - Y SYS LO PR MESSAGE INOP - HYD UPON TROUBLESHOOTING FOUND HYD PTU LEAKING AT CHECK VLV AND UNION FOR QUICK DISCONNECT. REPLACED BOTH O-RINGS PER AMM SUBTASK 29-13-15-560-050-E. LEACK CHECK GOOD NO LEAKS FOUND AT THIS TIME & SERVICED YELLOW HYD SYS PER AMM 12-12-29-611-001-A.