As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE INSPECTING TANK FOR A SUSPECTED LEAK, IT WAS NOTED THAT THE FUEL FILLER FITTING ON THE INBOARD FILLER HAD BECOME DETACHED FROM THE TANK. A WHITE FLAKEY RESIDUE WAS OBSERVED INSIDE THE TANK AND IS SUSPECTED OF BEING THE GLUE USED TO BOND THE METAL FITTING TO THE RUBBER TANK.