What was found
EMERGENCY DECLARED, LT HYD QTY (EICAS C) ANNUNCIATED ON FINAL APPROACH. SHORTLY AFTER LEFT SYSTEM PRESSURE WAS LOST, AFTER GO AROUND ACCOMPLISHED QRH PROCEDURE AND RETURNED FOR LANDING. QTY DEPLETED BEFORE L ENG PERFORMED OPS AND LEAK CHECK OF LT ENGINE DRIVEN AND ELECTRIC HYDRAULIC PUMPS IAW AMM 29-11-01-404-020 AND AMM 29-11-05-404-099-001. OPS AND LEAKS CHECKS GOOD OF BOTH PUMPS. CYCLED LANDING GEAR HANDLE PER AMM 32-32-02-404-010. CYCLED ALL FLIGHT CONTROLS AND THRUST REVERSER TO BLEED AIR. ALL CHECKS NORMAL