As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ECAM CAUTION MESSAGE - Y RSVR LO LVL MESSAGE INOP - HYD OCCURED IN CRUISE.QUANTITY NORMAL AND BRAKEACCUMULATER LEVEL DID NOT DECREASE. PER POST FLIGHT REPORT AFS1 MESSAGE HYDRAULIC YELLOW 3151 GN - SYSTEM PRESSURE SWITCH FAULT. REMOVED AND REPLACED 3151 PRESSURE SWITCH REF AMM 29-32-12-400-003-A. OPERATED YELLOW SYSTEM NO MESSAGE OPS CHECKS GOOD.