What was found
LOST GREEN HYD SYSTEM WHILE IN A HOLDING PATTERN ABOVE PLANNED DESTINATION. GREEN SYSTEM EDP REPLACED AWAITING FINDINGS FROM THE VENDOR (ARINC). REPLACED NR 1 ENG DRIVEN PUMP, REF MM29-11-51. REPLACED CASE DRAIN FILTER, PDI NOT POPPED. NO DEBRIS FOUND IN FILTER. FILTER PLACED IN CONTAINER WITH PUMP.