What was found
LOST HYD B SYSTEM. EMERGENCY DECLARED. SERVICED B SYSTEM HYDRAULICS TO FULL 7 GALLONS. WITH ENGINE NR 2 RUNNING FOR 30 MIN AND THEN WITH B SYSTEM ELECTRIC PUMP NO EXTERNAL HYDRAULIC LEAKS FOUND. B SYSTEM FLUID STARTED AT 105% BEFORE ENGINE RUN AND DROPPED TO 101% AFTER, REPLACED EDP PER AMM. RAN ENGINE AND OPERATED FLAPS, SLATS AND SPOILERS. OPERATED ALL HYDRAULIC SURFACES AND SYSTEMS. CLEANED QUICK DISCONNECT PRESSURE AND SUPPLY HYDRAULIC LINES ON NR 2 ENGINE PYLON. ALL SYSTEMS OK NO LEAKS NOTED.