What was found
NR 1 ENG EICAS MSG ENG SEC CONT DISPLAYED. REPLACED LEFT ENGINE EEC PER FIM 71-EPCS MSG INDEX S274-24. AND MM73-21-04. CHECKED ALL CONNECTORS ON EEC AND FIREWALL, FOUND OK. RAN ENGINE NO FAULTS.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
NR 1 ENG EICAS MSG ENG SEC CONT DISPLAYED. REPLACED LEFT ENGINE EEC PER FIM 71-EPCS MSG INDEX S274-24. AND MM73-21-04. CHECKED ALL CONNECTORS ON EEC AND FIREWALL, FOUND OK. RAN ENGINE NO FAULTS.