As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING T/C 78273000 HAD SHORT TIME FAULT ON #2 ENGINE, 73-30902 - T12 SIGNALS DISAGREE. GROUNDED - YES. VERIFIED MAINT MSG/FAULT 73-30902 STILL ACTIVE ON ALL LEGS #2 ENGINE. PERFORMED EEC TEST AND SHOWS FAULT STILL ACTIVE. REMOVED AND REPLACED #2 ENG T12 SENSOR REF FIM 73-26 TASK 805 AND AMM 73-21-05. NO FAULTS IN EEC TEST AFTER SENSOR REPLACEMENT. ETOPS SIGNIFICANT SYSTEM GROUND VERIFICATION SUCCESSFUL.