What was found
HNL - FLT 12 - AIR TURN BACK, DURING CLIMB THROUGH 10,000 FT, 'HYD SYSTEM NR 3 ELEV OFF', ILLUMINATED. DURING PREFLIGHT, QTY 3 INDICATED 8.5 GAL. AFTER LIGHT ILLUMINATED, QTY SHOWED 4.5 GALLONS WHEN GEAR WAS EXTENDED, QTY SHOWED 3.9 GALLONS. FOUND FORWARD NON-REVERSIBLE PUMP SHUTOFF VALVE CRACKED AT HOUSING. REMOVED AND REPLACED SHUTOFF VALVE. OPS AND LEAK CHECK OK. RESERVICED NR 3 HYDRAULIC SYSTEM. (M)