What was found
WHILE PERFORMING T/C 78273000 FOUND ECONOMIC FAULT MSG 77-10842 THE TOP RIGHT EGT SIGNAL (T49.5S1) IS OUT OF RANGE ON THE NR 2 ENGINE. GROUNDED - YES. PERFORMED FIM 77-21 TASK 801. COMPLETED EGT INDICATION SYSTEM TROUBLESHOOTING AND CONNECTOR CLEANING REF AMM 77-21-00-140-801. PERFORMED T49.5 AND EGT SYSTEM INSPECTION PER AMM 77-21-01-200-801-F00. FOUND S1, S3, AND S4 RESISTANCE OUT OF LIMITS. REMOVED AND REPLACED S1, S3, AND S4 REF AMM 77-21-01/401. EEC TEST PASS, PERFORMED SUCCESSFUL REPAIR CONFIRMATION OF FIM 77-21 TASK 801, AND SUCCESSFUL ETOPS GROUND VERIFICATION. PERFORMED SUCCESSFUL REPAIR CONFIRMATION REF FIM 73-11 TASK 801. CLEARS THE PLT.