As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER ENGINE START LEFT ENGINE EEC WENT TO ALTN MODE ON OVERHEAD PANEL EICAS MESSAGE L ENG EEC MODE. RETURN TO GATE. REMOVED AND REPLACED RT ADIRU NO HELP. FWD TO MCO AND PLAC PER MEL 73-21-01A. REPLACED LEFT ENG EEC DURING EEC TEST PIMU GROUND TEST FOUND FAULTS 351-16 A/B ALTN MODE AND 351-26 A/B R ADC CHAN FAIL. TRIED RELAY K10339 NO HELP REINSTALLED ORIG K10339 460162 FOUND DISC DA1711.