As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ENGINE EEC EICAS MESSAGE AND LEFT ENG EEC SWITCH INOP. AIRCRAFT BACK TO GATE AND GROUNDED BY MAINTENANCE. MAINTENANCE DEFERRED LT EEC IAW B767 MEL 73-21-22. PLACARDS INSTALLED; A/C RELEASED ETOPS 180. NO MAINT. DEACTIVATION REQUIRED. AIRCRAFT RETURNED TO SERVICE.