As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REMOVAL OF THE NR 2 CYLINDER, MECHANIC NOTED B-NUT ON THE NR 2 CYLINDER FUEL LINE LOCATED AT THE T-FITTING WAS WORN. THE B-NUT HAD BEEN CHAFING AGAINST THE STARTER MOTOR CABLE AND HAD WORN THE FUEL LINE NUT TO AN UNSERVICEABLE CONDITION. REPLACED B-NUT AND REPOSITIONED LINE.