As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TYS - FLT 4301 - CREW REPORTED THAT AFTER TAKEOFF THEY OBSERVED SMOKE IN THE LAVATORY. AIRCRAFT RETURNED TO THE FIELD WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT AND PERFORMED SEVERAL ENGINE RUN OPERATIONAL CHECKS WITH NO DISCREPANCIES NOTED. AIRCRAFT RELEASED FOR SERVICE. (M)