What was found
DURING TAXI-OUT, WHEN POWER WAS APPLIED TO ENGINE FOR TAKEOFF, FLIGHT CREW NOTED NR 1 ENGINE EGT 'HIGH ALERT" FOLLOWED BY EGT RISE MAX EGTS OF 803 DEGREES CELCIUS. FLIGHT CREW ELECTED TO RETURN TO GATE FOR MAINTENANCE TROUBLE-SHOOTING. A/C RETURNED DEPARTURE GATE WITHOUT FURTHER INCIDENT. IN TROUBLE-SHOOTING EGT INDICATING SYSTEM FAULT PER FIM, MX REP FOUND LOOSE CONNECTOR ON W-6 WIRING HARNESS. CORRECTED SAME. GROUND RUNS OF ENGINE INDICATED NO FAULTS. A/C RETURNED TO SERVICE. (M)