What was found
NDIS 658 29-13 0008050 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 10:56 PHL R&R ELECTRIC DRIVEN MOTOR PUMP & HYDRAULIC LINE IAW AMM 29-10-04. OPS CHECK GOOD. R&R ENGINE DRIVEN PUMP IAW AMM 29-10-03. REQUIRES OPERATIONAL & LEAK TEST. LEAK CHECK GOOD. OK FOR SERVICE