What was found
EMERGENCY DECLARED, Y HYD RESERVOIR LEVEL CONTINUALLY DECREASES IN FLIGHT. HYD Y RSVR LO LVL ECAM DISPLAYED. MSI / ODI EVENT. FOUND BAD O-RING ON YELLOW SYSTEM SIDE OF PTU MANIFOLD, FIN 3015GM. R/R O-RING PER A-319 AMM 20-20. LEAK CHECK OK. C/W A-319 AMM 29-00-00-280-006-A01 DUE TO POSSIBLE RT ENGINE PUMP CAVITATION. NO PROBLEMS NOTED. C/W GO GO ODI/MSI 29 21. C/W MCC CALL CAR. (LP: 8925798, AIRCRAFT WAS GROUNDED)