As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PROIR TO STARTUP F/O AND CAPT HEARD WHAT SOUNDED LIKE ELECTRICAL ARCING AND SPARKING. THEN SMELLED ELECTRICAL SMOKE IN THE COCKPIT. OVERHEAD SWITCH ONLY LIGHTING / CIRCUIT BREAKER WAS POPPED. RESET OVERHEAD PANEL LIGHTING CIRCUIT BREAKER. NO FAULTS NOTED OR ABNORMAL ODORS . ACFT OK FOR SERVICE ALSO, TSI 33-10/0262 WRITTEN & C/W. ALSO, EA 1-3310-144184 WAS WRITTEN AND C/W TO PULL AND COLLAR CB C-13 (B1-539).