What was found
DURING REFUELING WITH SYSTEM PRESSURIZED THE REAR DRAIN ON THE AFT OUTSIDE WALL OF THE #2 ENGINE NACELLE LEAKS FUEL. LEAK RATE GREATER THAN 5 DROPS PER SECOND OBSERVED AT TIMES. AFTER REFUELING STOPPED AND HOSE DISCONNECTED NO LEAKS NOTED. PLACED PRESSURE REFUEL SYSTEM ON MEL 28-20-1C. 6/17 CLEARED BY REMOVING BOAT TAIL FARING REF Q400 AMM 54-32-06-000-801. REMOVED REFUEL/DEFUEL ADAPTER ASSEMBLY REF 28-24-11-000-801. REPLACED THE PACKINGS AND COUPLING. REINSTALLED REFUEL/DEFUEL ADAPTER 28-24-11-400-801 AND REINSTALLED BOAT TAIL FARING REF 54-32-06-400-801. LEAK CHECK GOOD. CLEAR DEFECT. RETURNED TO SERVICE.