What was found
LT HYD QTY EICAS C, LEFT HYDRAULIC RESERVOIR QUANTITY IS LOW, HYD AUTO EVEN T RAN CHKLIST IAW QRH. AFT ER SECURING BOTH L PUMPS RUDDER RATIO DISPLAYED. QTY SLOWLY RETURNED NORMAL & LANDING WITH ALL MESSAGES & INDICATIONS RETURNING TO NORMAL. CREW STATED LT HYD QTY DROPPED TO .37 WITH RF INDICATION. FOLLOWED QRH TURNED OFF LT ENG & LT ELEC HYD PUMPS AND LT YAW DAMP. LT QTY INDICATION SLOWLY RETURNED TO NORMAL .90. CREW TURNED PUMPS BACK ON FOR APPROACH IAW FIM 29-33 FAULT TREE 803. REPLACED LT HYD RESERVOIR 99-2936-9-9002, QTY TRANSMITTER IAW AMM 29-33-01. OPS CHECKED SYS WITH NO DEFECTS OR PARTS USED.