As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
30A PANEL PCB SMOKED IN FLIGHT WHILE RETURNING TO BASE. AIRCRAFT LANDED SAFELY BUT SMOKE WAS SMELLED AND SEEN IN COCKPIT, STROBE SWITCH WAS FOUND MELTED TO BOARD. PANEL HAS BEEN REPLACED AND STROBE SYSTEM IS MEL'D, PLACARD IS INSTALLED AND BREAKER IS PULLED. ALL OTHER SYSTEMS CHECKED AND FUNCTION NORMALLY.