As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3237 DISC: LOSS OF YELLOW HYD FLUID AT CRUISE. C/A: FOUND PTU SUPPLY CHECK VALVE ON PTU MANIFOLD LEAKING. R+R PTU SUPPLY CHECK VALVE PER A320 AMM 29-13 WITH NEW PACKINGS. OPS + LEAK CHK GOOD. OK FOR SVC. SERVICED YELLOW HYD SYS FLUID PER A320 AMM 12-12. (LP: 7021176)