As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING PRE-FLIGHT INSPECTION, THE CREW REPORTED NUMEROUS INTERIOR EMERGENCY LIGHTS TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE AFFECTED EMERGENCY LIGHT BATTERY PACK IAW ATR 42-500 MM 33-51-21, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (X)