As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - DURING C-CHECK INSPECTION, THE NR ONE 1 AND NR 2 EMERGENCY LIGHT POWER SUPPLIES WERE FOUND TO BE INOPERATIVE. MAINTENANCE REMOVED AND REPLACED THE AFFECTED EMERGENCY LIGHT POWER SUPPLIES, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M) REF C2XA00IA331.