What was found
INSPECTION TYPE: NA, ATB, NO EMERGENCY DECLARED & NO EQUIPMENT USED. T/O & 38 MINS GOT L HYD QUANTITY EICAS LT QUANTITY L HYD PRIM PUMP. EICAS LIGHT CAME ON WHEN USING SPEEDBRAKES. ARRIVED WITH ZERO FLUID IN LT SYS. NEVER LOST SYSTEM PRESSURE FOUND ELECTRO-HYD SERVO VALVE ON RUDDER RATION CHGR ACT LEAKING FROM PLUG ON SIDE OF VALVE, REF AMM 27-21-15. R & R RRCA SOLENOID VALVE, AS PER AMM 27-21-15-201. OPERATIONS CHECK OK, PER AMM 27-21-15-422-024. NO LEAK NOTED AT THIS TIME.