What was found
CLM - ELECTRICAL OVERHEAT SMELL IN COCKPIT AND CABIN AFTER TAKEOFF. AIRCRAFT RETURNED TO FIELD AND LANDED WITHOUT FURTHER INCIDENT. AIRCRAFT MADE SAFE FOR FERRY FLIGHT TO PDX. SMOKE AND ASSOCIATED ODORS ORIGINATED FROM CAPTAINS LEFT HAND DC CIRCUIT BREAKER PANEL. FEEDER WIRE 2431151A81 FROM C/B A10 WAS BURNT AT THE CONNECTION AT B1. BUSS BAR CONNECTING C/B A1 THROUGH A4 WAS CHARRED AND SUFFERED EXTREME HEAT DAMAGE. TERMINAL AT THE LINE FEED SIDE OF THE C/B WERE EQUALLY DAMAGED. ALL BUSS BARS AND CIRCUIT BREAKER WITH HEAT DAMAGE WERE REPLACED.