What was found
LEFT HYD SYS LEAK & LOW FLUID FAILURE. SEVERAL ASSOCIATED EICAS & STATUS MESSAGES. LT HYD QTY WENT TO .12, FOLLOWED BY A LT QTY LOW EICAS MESSAGE, LT RESERVOIR PSI LIGHT, SHUT PUMPS OFF UNTIL LANDING. EMERGENCY DECLARED, FOUND VALVE HYD PRESSURE REDUCER, RUDDER ELEVATOR LEAKING. R & R ELEVATOR PRESS BYPASS VALVE IAW AMM 27-31-13-4. LEAK & OPS CHECKED GOOD.