As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH- FLIGHT NUMBER 3792 THE CREW NOTED SMOKE IN THE CABIN AND RETURNED TO IAH WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NUMBER ONE ENGINE, PERFORMED A OPERATIONAL AND LEAK CHECK. NO DEFECTS NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.