What was found
MSP - FLT 1181 - EN ROUTE FROM PIT TO MSP, CREW REPORTED ON APPROACH TO MSP LOST FLIGHT DIRECTOR, NR 1 ENG N1, NR 1 ENG FUEL FLOW, ANTI-SKID, YAW DAMPER, NR 1 ELECTRIC HYD PUMP, CABIN AND COCKPIT EMERGENCY LIGHTS AND THE NR 1 TRU C/B TRIPPED. FLT LANDED W/O FURTHER INCIDENT. MX VERIFIED GEN AND BUS VOLTAGES AND ACCOMP POWER TEST ON M400 PANEL. R/R''D THE NR 1 TRU (P/N 2-299). ACCOMP ENG RUN AND ELECTRICAL CHECK. ALL SYSTEMS CHECK OK. THE FOLLOWING DAY, THE NR 1 TRU C/B TRIPPED AGAIN DURING FLIGHT. T/S FOUND A FEEDER FAULT AT CONNECTOR D410 PHASE B AT NR 1 ENGINE GENERATOR HARNESS TO FIREWALL. AIRCRAFT WAS RELEASED ON MEL 24-1. THE NR 1 ENGINE GENERATOR HARNESS AND D410 FIREWALL CONNECTOR ARE PROGRAMMED