What was found
LEFT HYD SYS LEAK & LOW FLUID FAILURE. SEVERAL ASSOCIATED EICAS & STATUS MSGS. LT HYD QTY WENT TO .12, FOLLOWED BY A LT QTY LOW EICAS MSG, LT RESERVOIR PSI LIGHT, SHUT PUMPS OFF UNTIL LANDING. ADDED 4 GALLONS TO LT HYD RESERVOIR, PRESSURIZED LT SYS, ISOLATED LEAK TO FWD STAB AREA AROUND THE ELEVATOR PRESSURE REDUCER & BYPASS VLVS IAW AMM 27-31-13-4. FOUND VALVE HYD PRESSURE REDUCER LEAKING. R & R ELEVATOR BYPASS VALVE, LEAK CHECKED GOOD.