As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TESTED CAPTAINS ICE DETECTION LIGHT SWITCH. SWITCH WAS STICKING AND ELECTRICAL ODOR DETECTED AFTER PRESSING SWITCH. SMALL TRACE OF SMOKE OBSERVED IN COCKPIT. ICE DETECTOR LIGHTS DAY OPS PERFORMED HIDDEN DAMAGE INSPECTION. NO DEFECTS FOUND. CAPPED AND STOWED LIGHT WIRES SB 20-9. R & R CAPTAINS ICE DETECTION LIGHT SWITCH AS REQUIRED. RECONNECTED LIGHT WIRES. OPS CHECKED GOOD.