What was found
NUMBER 2 HYDRAULIC SYSTEM WENT TO '0' QUANTITY DURING FLIGHT. FOUND PRESSURE BOOTSTRAP LINE CHAFED IN MAINTENANCE BAY FORWARD OF APU DOOR, PANEL NR 311AB. TEMPORARILY REPAIRED BY INSTALLING FLEX LINE IAW BMM 6-15-10 SECURED LINE, RAN A/C PUMPS AND PRESSURIZED NR 2 SYSTEM USING ENGINE PUMPS, NO LEAKS NOTED. SERVICED TO 8 GALLONS PRIOR TO RUN. CHECKED ALL FILTER DELTA PINS, NO DEFECTS NOTED.