As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON DESCENT INTO KTOL, THE CREW PUSHED IN ANTI FOGGING CIRCUIT BREAKER AND THE CREW DETECTED SMOKE, THE CREW PULLED THE CIRCUIT BREAKER AND SMOKE ODOR DIMINISHED. THE CREW LANDED IN KTOL WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED RELAY. OPERATIONAL CHECK GOOD IAW DACO MAINTENANCE MANUAL 30-41-0. AIRCRAFT WAS RETURNED TO SERVICE.