What was found
AT 100 NM FROM GDL, LOST GREEN HYDRAULIC SYSTEM, GRAVITY GEAR EXTENSION AND LANDING NORMAL. PUMPS OFF AT 2300 PSI. FOUND EVIDENCE OF LEAKAGE ON ENGINE NR 1 PYLON. AFTER CLEANANCE AND INSPECTION FOUND GREEN PRESSURE SW LEAKING HYD DUE TO O-RING FAILURE, REPLACED O-RING IAW 29-11-62-4, SERVICED GREEN HYD SYS IAW AMM 12-12-29-0, CLEANED GREEN HYD SYS PUMP DELIVERY FILTER IAW AMM 29-11-42-3 AND GREEN SYS PUMP CASE DRAIN FILTER IAW AMM 29-11-36-3-02. RESTORED FREE FALL EXTENSION SYSTEM IAW AMM 32-33-00-2. RAN ENG NR 1 IAW JRH 5A, FOR 15 MINUTES, SHUT DOWN ENGINE AND INSPECTED PYLON AREA FOR LEAKS. NO LEAKS FOUND, GREEN HYD FLUID LEVEL AND PRESSURE INDICATIONS WERE NORMAL. OK FOR SERVICE.