As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CVG - FLIGHT 2772 - THE CREW REPORTED SMOKE IN THE CABIN /CKPIT IN CRUISE FLIGHT WITH THE SOURCE UNKNOWN. THE AIRCRAFT RETURNED TO CVG WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND APPROVED THE AIRCRAFT TO FERRY TO IAH WHERE IT AGAIN LANDED WITHOUT INCIDENT. IAH MAINTENANCE REMOVED AND REPLACED THE NUMBER ONE ACM, OPERATIONALLY TESTED WITH NO DEFECTS, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.