As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TROUBLESHOOTING RT ENGINE PROBE HEAT MALFUNCTION, ATTEMPT WAS MADE TO REPLACE RELAY K10479. AS RELAY PANEL OPENED SPARKS CAME FROM WIRE BUNDLE. REMOVED POWER FROM THE AIRCRAFT AND FOUND WIRE 6092-20 WAS BURNED THRU, REFERENCE WIRING DIAGRAM MANUAL 30-24-12. SPLICED IN A NEW PIECE OF WIRE. TAPED AND SECURED WIRE BUNDLE. CHECK-C 12-19-00 LAX.