As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE ACCOMPLISHING T/C 78273000, FOUND NR 1 ENGINE FAULT CODE 73-10201. INTERNAL EEC FAULT. LONG TIME FAULT. NO ENGINE CONTROL LIGHT. GROUNDED-YES. CW B737-900 FIM 73-21 TASK 801. EEC TEST, ACTUATORS TEST AND GROUND ENGINE RUN REVEALED NO CURRENT FAULTS. REPAIR CONFIRMATION REVEALS FAULT IS CORRECTED. OK FOR SERVICE.