What was found
AT APPROX 1+00 FLIGHT "SYS3ELEV" OFF ALERT ILLUMINATED. HYDRAULIC SYSTEM WAS AT 4.7GAL, DEACTIVATED NR 3 ENGINE PUMPS. HYDRAULIC QTY STABILIZED, DIVERTED TO KATL. REPRESSURIZED FOR LANDING USING RMP, HYD QTY REMAINED STABLE. DECREASED TO 2.8GAL AT LANDING GEAR EXTENSION. AFTER FUEL DUMP, TANK 2 LT AFT PUMP INOP. REMOVED AND REPLACED LT MLG TRUCK BEAM TRIM CYLINDER IAW MM32-37-01-401, BLED SYSTEM PER MM 32-37-01-400-801 AND PERFORMED OPERATIONAL CHECK PER MM 32-37-00-710-801. OPERATION AND LEAK CHECK GOOD. OPERATED ALL FLIGHT CONTROL SURFACES, RUN ENGINES AND OPERATED GEAR UP/DOWN HANDLE. NO ADDITIONAL HYD LEAKS NOTED. TOPPED OFF SYSTEM FLUIDS, OK FOR SERVICE.