As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING OTHER MX TO CLEAN AN INTERNAL FUEL BAY IT WAS NOTED THAT THERE WAS A BLACK STREAK GOING BOTH UP FROM AND DOWN FROM THE FUEL QUANTITY WIRE HARNESS CONNECTOR INSIDE THE FUEL BAY OF THE LEFT WING. REMOVED THE CONNECTOR FROM THE BULKHEAD AND FOUND THAT THE BACKSHELL WAS FULL OF FUEL. A PRECAUTIONARY CHECK OF THE RT WING HAS DETERMINED THAT THE SAME CONDITION EXISTS IN THAT WING TOO.