As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING PREFLIGHT INSPECTION THE CREW REPORTED THAT THE OVERWING CEILING EMERGENCY EXIT LIGHT WAS INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE NUMBER THREE EMERGENCY LIGHT BATTERY PACK, OPERATIONALLY TESTED WITH NO DEFECTS. THE AIRCRAFT WAS APPROVED OF RETURN TO SERVICE.