What was found
NR 1 ENGINE TREND DATA CONTINUES TO SHOW A SHIFT IN DELTA CRUISE AND TAKEOFF MARGIN INDICATIVE OF EGT INDICATION ERRORS. PREVIOUS MAINT, EGT CONNECTOR CLEAN AND HARNESS REPLACEMENT. REMOVED NR 1 ENGINE EEC IAW AMM 73-21-60-000-801-F00. INSTALLED EEC ON NR 1 ENGINE IAW AMM 73-21-60-400-801-F00. PERFORMED THE FOLLOWING TESTS IAW REF TABLE 71-00-00-800-811-F00 FADEC SYS TEST, 73-21-00-700-802-F00; ERASE EEC FAULTS, 73-21-00-800-801-F00; EEC TEST, 73-21-00-700-804-F00; IDENT/CONFIG, 73-21-00-700-808-F00; TEST 12, ACTUATORS TEST, 71-00-00-700-807-F00; EEC DISCRETES TEST, 73-21-00-700-809-F00. ALL TESTS PASSED. NO FAULTS FOUND.