As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORT THAT ON APPROCH BOTH EEC WENT TO ALT MODE AND FUEL FLOW BLINK A FEW TIME AND THEN WENT BLANK. EMERGENCY DECLARED. BOTH ENG AND DEU FAULTS DEU1. REPLACED DEU 1 PER AMM 31-62-21. INSTALLED CORRECT SOFTWARE. RAN ENGINE AND NO DESCREPANCIES NOTED.