As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THE THE ENGINE DIAGNOSTIC SYSTEM (EDS) ANNUNCIATOR WAS ILLUMINATED. OPERATIONS WERE CONTINUED ON MEL. AT THE MAINTENANCE OPPORTUNITY, THE MAINTENANCE TEAM DETERMINED THE EDS COMPUTER WAS DEFECTIVE AND WAS REPLACED WITH A REPAIRED UNIT. OPS CHECKS WERE SATISFACTORY AND THE AIRCRAFT WAS RETURNED TO SERVICE.