What was found
ECAM CAUTION MESSAGE - Y ENG PUMP LO PR MESSAGE INOP - HYD REPLACED PTU MANIFOLD QUICK DISCONNECT FITTING O-RING M&E SERVICED YELLOW STSTEM HYD. 40-0595-3-1983 , LEAK CHECK OK, MOTOR ENGINE PUMP PRESSURE NORMAL , CHECK ALL DPI AT FILTERS OK REF AMM 29-00-00-280-006-A-01 . PER FLT CREW PUMP TURNED OFF AT FAULT. DEBRIEFED CREW. CREW REPORTED LO PRESS ON ENG 2 . CREW TURN OFF PTU AND YELLOW ENG PUMP. ON FINAL CREW ATTEMPTED TO TURN ON ENG PUMP AND SHUT IT BACK DOWN APPROX 4 SEC.