As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS - HYD B RSVR LO AIR PR ON ECAM. TROUBLESHOOT AND FOUND BLUE HYDRAULIC RESERVOIR RELIEF VALVE (FIN:5001JM2) INOP. WILL NONT HOLD HEAD PRESSURE. NEED TO BE REPLACED. 669735 12SEP19. REMOVED AND REPLACED BLUE PRESSURE AIR RELIEF VALVE PER 29-14-33. LEAK CK OK, OPS CK OK. OK FOR SVC. P/N OFF: 42F0026 P/N ON: 42F0029 S/N OFF: NV014082 S/N OFF: NV017405.