What was found
NR 1 ENGINE, PERFORMED TC 78273000, FOUND FAULT 73-31371. UPPER EGT SECTORS READING HIGH, ECONOMIC FAULT, REPAIR WITHIN 500 HOURS. ACFT GROUNDED. UNABLE TO DUPLICATE DEFECT. NR 1 ENGINE ELECTRONIC ENGINE CONTROL BITE IAW T/C 78273000 SHOWED NO INSTANCES OF FAULT 73-31371 IN THE LAST TEN STARTS. ACCOMPLISHED T/S FOR FAULT 77-20871 IAW FIM 77-21, TASK 804. PERFORMED EGT CONNECTOR CLEANING IAW AMM 77-21-00-140-801, ALL CONNECTORS IN TABLE 2 CLEANED. AFTER CLEANING, T495S4 READINGS WERE STILL OUT OF LIMITS. R & R T495S4 PROBE IAW AMM 77-21-01-000-801, 77-21-01-400-801. OPERATED ENGINE AND FOUND T495 READINGS WITHIN LIMITS WITH ENGINE RUNNING AND NOT RUNNING. PERFORMED ELECTRONIC ENGINE CONTROL TEST IAW AMM 73-21-00-700-804-F00. NO FAULTS NOTED.