What was found
REF T/C 78273000- NR 2 ENG MAINT MSG 73-31372 "UPPER EGT SECTORS READING HIGH ECONOMIC FAULT- ETOPS A/C. GROUNDED - YES. REPLACED T49.5 PROBE S4 DUE TO A COLD TEMP OF 221.84 DEG. VS S1- 39.34. REF AMM 77-21-01-400-801-F00. ACCOMPLISHED EEC TEST REF. AMM 71-00-00-700-822-FOO- TEST OK. VERIFIED COLD S4 WAS 15.59 & S1 WAS 16.53. "PRECAUTIONARY" CLEANED & INSPECTED J10 & J9 HARNESS CONNECTORS @ CJ10 & 9 JUNCTION BOXES & SHOOK DOWN J10 HARNESS. NO DEFICIENCIES NOTED. S2 & S3 BOTH READ 4.56 DEG. RAN ENGINE PRECAUTIONARY & VERIFIED TEMPS STILL OK. NO FAULTS IN BITE CK.