As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCI - DURING SCHEDULED MAINTENANCE, THE RIGHT OVERWING EMERGENCY EXIT MARKER WAS FOUND TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NR 3 INVERTER, OPERATIONALLY TESTED THE EMERGENCY LIGHTING SYSTEM, AND CLEARED THE DISCREPANCY.