What was found
IDLE DISAGREE EICAS, RTFL. REPLACE RT ENGINE EEC FOR TROUBLESHOOTING. REPLACED EEC PER AMM, ACCOMPLISHED ENG RUN PER TASK 6 MM 71-00-00-501, NO HELP. CARRIED OUT PIMU BITE TEST FOUND CHANNEL A & B MESSAGES, EEC UNIT FAIL-EEC CTRL- EEC CAT 1 AND EEC CAT 2 MESSAGES. REPLACED RT EEC. CARRIED OUT TEST 6, STATUS MESSAGE NOT ACTIVE AND ERASED.