As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CMH - EEL - DURING COCKPIT/CABIN GENERAL CHECK THE EMERGENCY LIGHTS FAILED TEST. MAINTENANCE REMOVED AND REPLACED THE EMERGENCY POWER SUPPLY UNIT (11WL) AT L/H OVER WING EXIT LOWER SIDEWALL IAW AMM 33-51-38, OPERATIONAL CHECK WAS GOOD.