As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING MAINTENANCE VISIT INSPECTION, THE EMERGENCY LIGHT BATTERY PACK AT 62WL WAS FOUND TO BE WEAK. MAINTENANCE REMOVED AND REPLACED THE AFFECTED BATTERY PACK IAW ATR42-500 MM 33-51-21, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)