As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL MIGRATION FROM THE RT TANK TO CENTER TANK. UPON INVESTIGATION IT WAS FOUND THAT A CLAMP INSULATOR HAD FAILED AND STARTED TO CHAFE A SMALL DIAMETER FUEL LINE. THE FUEL LINE EVENTUALLY WAS PUNCTURED AND ALLOWED FUEL TO MIGRATE FROM THE RT TANK TO CENTER TANK.