As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FUEL WAS NOTICED UNDERNEATH THE ACFT. THE ACFT WAS GROUNDED AND INSPECTED FOR LOCATION OF FUEL LEAK. AFTER REMOVING THE 2 FORWARD TANKS THE AFT TANK WAS FOUND WITH CHAFING MARKS ON LOWER PORTION CAUSED BY ANCHOR NUTS, USED TO SECURE THE FORWARD PANEL INFRONT OF THE TANK.