What was found
DURING CRUISE FLIGHT APPROXIMATELY 15 NM FROM OASD THERE WAS A LOUD POP & BANG FROM THE RT SIDE OF THE CB PANEL FOLLOWED BY SMOKE & AN ELEC SMELL. THERE WAS A LOSS OF AFCS, NR 2 FUEL BOOST PUMPS, & THE RECTIFIER. THE EMERGENCY CHECKLIST WAS PERFORMED & ALL NECESSARY ACTIONS ACCOMPLISHED. THE SMOKE CLEARED & A RETURN TO OASD WAS WITHOUT INCIDENT. FOUND BURNT WIRING IN ACFT CB PANEL, FWD UPPER CONNECTOR FOUND NO EVIDENCE OF ANY OTHER DAMAGED WIRING. REMOVED DAMAGED WIRING & REPINED CONNECTOR IAW AC43 13 SECTION 12.