As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3317 ON DESCENT ECAM "HDY Y SYS LO PR" MSG. CORRECTIVE ACTION: OVERHEAT SYSTEM TEST PASS. NO DEFECTS IN YELLOW SYSTEM HYD TEST. R&R 3JY AND VERIFIED WIRING FROM P/B SWITCH TO PUMP. PLUG OF DEPRESS SOLENOID ON HYD PUMP DAMAGED AND INTERMITTENT OPEN. REPLACED HARNESSAND REPLACED HSMU (1JG) IAW A330 AMM 29-11. (7287302)