What was found
(AIRCRAFT NOT GROUNDED) (EMERGENCY DECLARED) AT CRUISE FL350 RECEIVED ECAM HYD Y RSVR LO LVL / REF TSM 29-13-00-810-801-A AND 29-00-00-280-006-A , FOUND HYD PRESS HOSE FROM ENG 2 HYD PUMP CHAFFED AND LEAKING . R & R NR 2 ENG HYD PRESS HOSE TUBE ASSY PER AMM 29-13-49-000-002-A AND 29-13-49-400-002-A . DUE TO PUMP CAVITATION IN FLIGHT, R & R NR 2 ENG HYD DRIVEN PUMP IAW AMM 29-13-51-000-004-A AND 29-13-51-400-004-A . SERVICED YELLOW RESERVIOR IAW 12-12-29-611-001 TO WITHIN LIMITS . PERFORMED TEST OF YELLOW HYD SYSTEM IAW 29-13-00-710-002-A , PERFORMED ENG 2 IDLE RUN IAW 71-00-00-710-003-B , NO LEAKAGE NOTED . OPS CHECKED GOOD , MSG NOT PRESENT . ACFT OK FOR SERVICE.