As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING T/C 78273000, FOUND THE NR 1 ENGINE WITH A RECENT FAULT. ENGINE CONTROL LIGHT, MESSAGE 73-20111, INTERNAL EEC FAULT, A NO-GO FAULT. ACFT GROUNDED. REMOVED THE NR 1 EEC IAW AMM 73-21-60-000-801-F00. INSTALLED A NEW NR 1 EEC IAW AMM 73-21-60-400-801-F00. GROUND FUNCTIONAL TESTED GOOD IAW AMM 73-21-00-700-802-F00. SOFTWARE CHECKED GOOD.