What was found
ECAM CAUTION MESSAGE. Y ENG PUMP LO PR MESSAGE INOP. HYD TOMC UPDATE FLAGGING AS SDR ITEM CREW STATES THE Y-ENG PUMP FAILED AND PTU TOOK OVER, YELLOW SYS WAS NORMAL WITH PTU. REF TSM 29-13-00-810-804-A FOR TROUBLESHOOTING IAW TSM 29-13-00-810-804-A. ACCOMPLISHED OPERATIONAL TEST OF YELLOW HYDRAULIC SYSTEM IAW AMM 29-13-00-710-002-A. YELLOW ENGINE DRIVEN PUMP OPERATION CHECKED OK. NO FAULTS NOTED. REPLACED ENG 2 PUMP P/BSW AS A PRECAUTIONARY MEASURE AND PERFORMED TEST OF YELLOW HYDRAULIC SYSTEM AGAIN. OPERATIONS CHECK OK.