What was found
ON CLIMB-OUT, NOTICED NR 2 EGT NEEDLE/ANALOGUE GAUGE FLUCTATING-RECEIVED ECAM FOR NR 2 ENG OVERLIMITS. PULLED POWER BACK. GAUGE STABILIZED THEN STARTED TO FLUCTUATE AGAIN. RAN QRH, DECIDED TO RETURN. BURNED DOWN FUEL TO MAX LNBW. NORMAL LANDING, TAXI IN. DEBRIEFED CREW NO OTHER INDICATION ON NR 2 ENG FUEL FLOW, N1 AND N2 NORMAL. DURING SECURITY CK OF WIRE HARNESS ON ENG FOUND BOTH NUTS ON ENG TERMINAL BLOCK ON FAN CASE BEFORE CONNECTOR 4951P FINGER TIGHT. TIGHTENED NUTS PER SMP AND PROCEEDED TO CK WIRING FROM T591 JUNCTION BLOCK TO CONNECTOR 4951P. ALSO MEGGED WIRES. ACCOMPLISHED POWER RUN TO 1.3 EPR PER JRH CH 4-35.