What was found
THE LEFT SIDE CABIN LIGHTS QUIT WORKING ACCOMPANIED BY AN ELECTRICAL SMELL SHORTLY AFTER TAKEOFF FROM EWR. THE STAB TRIM QUIT WORKING A SHORT TIME LATER. THE AIRCRAFT WAS RETURNED TO EWR. THE NR 1 BUS OFF LIGHT ILLUMINATED ON FINAL. MAINTENANCE FOUND THE NR 1 TRANSFORMER RECTIFIER CIRCUIT BREAKER POPPED. THE NR 1 ENGINE GENERATOR FEEDER CABLES WERE BURNT AND THE CONNECTOR AND RECEPTACLE WERE SHORTED AT THE FIREWALL. THE NR 1 ENGINE GENERATOR FEEDER HARNESS WAS REMOVED AND REPLACED AND CONNECTORS D410 AND D3024 WERE ALSO REMOVED AND REPLACED IAW SWP 20-30-11 AND 20-61-19. AN OPERATIONAL CHECK OF THE NR 1 ENGINE GENERATOR WAS PERFORMED IAW MM 24-21-00, PAGE 509, ITEM N AND NO FAULTS WERE FOUND.