What was found
ON DESCENT NR 2 ENGINE EGT EXCEEDANCE 1007*C, PRECAUTIONARY SHUT DOWN. NO OTHER EXCEEDANCES, EGT GAUGE "X'D" OUT SEVERAL TIMES. WHEN TROUBLESHOOTING EGT HARNESS PER AMM 77-21-01-2, FOUND UPPER HARNESS LEAD HAD NORMAL, THEN HIGH THEN OPEN RESISTANCE WHEN SHAKING WIRES. CHECK NEW LEAD HARNESS AND WAS STEADY AT CORRECT RESISTANCE 7.2 OHMS. INSTALLED NEW HARNESS AND RAN NR 2 ENGINE AND HAD STEADY EGT READINGS AT NORMAL LEVELS PER JRH. LEAD EGT MANUFACTURE PART 8TK34ACA2, CPN 7700009 AND SERIAL DTA6166.