As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE AT FL210 ENGINE NR 1 EEC FLASHING "FAULT" AOM1 PROCEDURE NOT SUCCESSFUL. EMERGENCY DECLARED. RETURNED BACK TO SJU. DEFERRED INOP EEC NR 1 PER MEL 73-10 AUTH NR 090170D-A (MEL NR 73-10 CLEARED ON 09-21 AT SJU: PERFORMED ENGINE RUN-UP TO CHECK NR 1 EEC FAULT. PROBLEM NOT DUPLICATED AT THIS TIME, EEC WORKING NORMALLY AS PER MM NR 72-00-00).