As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ETOPS SIGNIFICANT SYSTEM - 1 ENGINE SN 41948 IS EXPERIENCING APPARENTLY UNCOMMANDED EEC CHANNEL CHANGES REPETITIVELY. REMOVED AND REPLACED NR 1 ENG EEC PER AMM 73-21-34-000-804-A/400-804-A. PERFORMED TEST OF EEC CONFIGURATION, TEST OF FADEC SYSTEM & LAND TEST. ALL TESTS PASSED. OK FOR SERVICE.