As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING WALKAROUND, FUEL WAS COMING FROM NR 2 ENGINE COWL. DISCOVERED LINE BETWEEN FUEL PUMP AND FIREWALL LEAKING FROM B-NUT AT FIREWALL. B-NUT TIGHTENED AND LEAK CHECKED. FLEET CAMPAIGN INITIATED TO CHECK TORQUE OF B-NUTS AND TORQUE SEALANT WILL BE APPLIED AND CHECKED ON PHASE CHECKS.