What was found
PDIS 658 29-13 2122873 04JAN20 PHL CLOSE HYDRAULIC FLUID LOSS ON SYSTEM 1 FOLLOWED BY HYDRAULIC SYSTEM 1 FAILURE. ( CAPTAIN SAID HYD LOSS WAS GRADUAL, BY THE TIME IT REACHED NEAR AMBER RANGE THEY DECIDED TO DIVERT TO PHL. BY THE TIME THEY LANDED THE SYSTEM WAS EMPTY.) FACT 04JAN20 23:35 PHL R&R ELECTRIC MOTOR DRIVEN PUMP & HYD LINE IAW AMM 29-10-04. OPS CHECK GOOD. OK FOR SERVICE. R&R ENGINE DRIVEN PUMP IAW AMM 29-10-03. OPS CHECK GOOD. OK FORSERVICE.