As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING SCHEDULED MAINTENANCE, THE EMERGENCY LIGHTING SYSTEM WAS FOUND INOPERATIVE. MAINTENANCE REMOVED AND REPLACED AN EMERGENCY LIGHT BATTERY PACK, OPERATIONALLY CHECKED THE EMERGENCY LIGHTS, AND THEN APPROVED THE AIRCRAFT FOR RETURN TO SERVICE. (X)