As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- FLIGHT 4117, DURING CLIMB THE CREW NOTED SMOKE IN THE CABIN AND GOT LAV SMOKE ON THE EICAS. THE CREW RETURNED TO IAH WITHOUT INCIDENT. MAINTENANCE REPLACED THE LIGHT ASSEMBLY AT SEATS 14A AND 15A. GROUND RAN AIRCRAFT AND FOUND NO DEFECTS. THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.