As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING OF AN UNRELATED DISCREPANCY, MX SMELLED BURNING ODOR. UPON FURTHER INSP, MX FOUND THE GALLEY DRAIN MAST ON FIRE. THE FIRE WAS EXTINGUISHED. MX FOUND THE FIBERGLASS HEATING ELEMENT HAD OVERHEATED AND CAUGHT ON FIRE. MX REPLACED THE HEATING ELEMENT AND DRAIN TUBE.