As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - A/C EN ROUTE FROM CLT TO IAH WHEN SMOKE WAS SEEN IN THE CABIN, CREW RETURN TO CLT WITHOUT INCIDENT OR INJURY. MAINTENANCE RAN A/C ON THE GROUND PER FIM 21-20-00-810-803-A. NO SMOKE OR FUMES DETECTED. OPS CHECK WAS GOOD AND WAS RELEASED BACK TO SERVICE.