As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH - THE CREW REPORTED THAT THE EMERGENCY LIGHTS CAME ON WHEN THE AIRCRAFT WAS DOWN POWERED WITH ALL SWITCHES IN CORRECT POSITIONS. MAINTENANCE REMOVED AND REPLACED THE NUMBER THREE EMERGENCY LIGHT POWER SUPPLY, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.