What was found
LOST YELLOW HYD SYS QUANTITY AT CRUISE C/W ECAM AND C/W QRH. EDP RUPTURED. PER MM 29-00-00-3, INSPECTED CLOGGING INDICATORS OF CASE DRAIN, DELIVERY AND RETURN FILTERS. NONE OUT. VISUALLY INSPECTED CASE DRAIN FILTER, NO CONTAMINATION OR DECOMPOSED FLUID FOUND. REMOVED AND REPLACED CASE DRAIN FILTER IAW MM 29-11-36-4. PRECAUTIONARY. REMOVED AND REPLACED YELLOW EDP IAW MM 29-11-32-4. SYSTEM BLEED ACCOMPLISHED IAW MM29-00-00-4. YELLOW SYS CHECK PERFORMED PER MM 29-00-00-6. SYSTEM OPERATES NORMALLY, NO LEAKS NOTED.