As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MASTER REFUEL VALVE LEAKED DURING REFUELING OF AIRCRAFT USING SINGLE POINT REFUEL SYSTEM. THE VALVE IS LOCATED IN THE MAIN GEAR WHEELWELL AND THE LEAKING FUEL TRAVELS ALONG THE WIRE BUNDLE FOR THE LOWER ROTATING BEACON AND INSIDE THE BEACON CAUSING BEACON FAILURE. THE VALVE ONLY LEAKS DURING REFUELING MAKING IT HARDER TO FIND THE LEAK.