What was found
BOS - HYDRAULIC SYS 3 FAILURE PASSING DURING CLIMB OUT. RESERVOIR LEVEL DEPLETED TO ZERO. FOUND SLAT SYSTEM HYDRAULIC LINE LEAKING FLUID. MADE A CUT APROX 3 FT INBOARD AND 3 FT OTBD FROM CENTER OF PYLON. INSTALLED 6 FT LONG FLEX LINE MADE OF THREE 2 FT LONG FLEX LINES UNIONED TOGETHER AND RINGLOKED TO THE 2 CUT ENDS OF THE RIGID LINE TO THE FLEX LINE. NR 3 HYDRAULIC SYSTEM NEEDS TO BE SERVICED AND SYSTEM NEEDS OPS AND LEAK CHECK. REFERENCE AMM 20-10-01-2.