As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INITIAL AIRCRAFT ELECTRICAL POWER UP E26 CIRCUIT BREAKER POPPED. FLT CREW RESET CIRCUIT BREAKER AND THERE WAS SLIGHT SMOKE AND NOTICEABLE BURNING SMELL. MAINTENANCE TROUBLESHOT AND DISCOVERED OVERHEAD COCKPIT LIGHT TRANSFORMER WAS SOURCE OF ISSUE. TRANSFORMER AND OVERHEAD LIGHT PANEL REPLACED IAW MM 32-12-10. OPERATIONAL CHECK GOOD.