As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON LANDING F/E'S PANEL BEHIND LIGHT SWITCH'S BEGAN TO ARC AND SMOKE. ON INSPECTION OF LIGHT SWITCHES FOUND DAMAGE ON FLOOD LIGHT SWITCHES PULLED BREAKERS AS REQUIRED AND TIED OFF CONTINUE DMI NR 8230998 IAW DC8 MM 33-1. REMOVED AND REPLACED RHEOSTAT TRANSFORMER OPS CHECK NORMAL IAW MM 33-01. THIS CLEARS DMI 8230998 PLACARDS REMOVED.