What was found
THE NR 2 AND NR 3 TRANSFORMER RECTIFIER CIRCUIT BREAKERS POPPED ACCOMPANIED BY AN ELECTRICAL SMELL IN THE CABIN DURING CRUISE AT FL 310. THE AIRCRAFT LANDED AT CLE WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 GENERATOR D410 FIREWALL CANNON PLUG BURNT. THE D410 PLUG AND A PIN SOCKET AND THE FIREWALL GENERATOR RECEPTACLE D3026 AND A PIN WERE REPLACED IN REFERENCE TO WIRING DIAGRAM 24-21-21 AND STANDARD WIRE PRACTICES MANUAL 20-62-26. OPERATION OF THE NR 2 GENERATOR CHECKED GOOD.