As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, SMOKE WAS OBSERVED COMING FROM THE REAR OF A CB PANEL. CB'S PULLED PROGRESSIVELY TO IDENTIFY ONE CAUSING SMOKE. OTHERS RESET AFTER ISOLATING FAULTY ONE. AIRCRAFT LANDED. ON GROUND, FAILED CB REPLACED. FURTHER TROUBLE SHOOTING REVEALED. POWER WIRE TO WING ICE INSPECTION LIGHT CHAFFED AGAINST STRUCTURE NEAR LIGHT ASSY. WIRE REPAIRED.