What was found
LOST GREEN HYDRAULIC SYSTEM PASSING THROUGH FL290. FLUID LEVEL DECREASED TO RED DOT ALMOST IMMEDIATELY. LEVELED A\C AT FL330, SLOWED TO GREEN DOT. COMPLIED WITH QRH. DESCENDED TO FL310 AND MAINTAINED .65 MACH. CONTINUED TO MEMPHIS, EMERGENCY DECLARED WITH CENTER, MANUAL GRAVITY EXTENDED GEAR. LANDED 18R EXITED HIGH SPEED TO BE TOWED IN. I CAPT. GREEN/REPORTS HYD PUMPS WERE ONLY OPERABLE FOR 10S DURING FLUID DECREASE. BOTH WERE TURNED OFF WITHIN 10 SECONDS. FOUND #2 ENG GREEN HYD PUMP SUCTION LINE LEAKING AT FIRST CLAMP ABOVE PUMP. BRACKET THAT SHOULD HOLD CLAMP WAS BROKEN AND WORE THRU LINE. REMOVED AND REPLACED LINE AND BRACKET.