As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED, RECEIVED A LAVATORY SMOKE INDICATION ON CLIMBOUT. THE FLIGHT ATTENDANT CONFIRMED A HAZY PRESENCE IN THE REAR OF THE CABIN AND THE CREW RETURNED TO FIELD. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE ISOLATED THE SMELL TO ENGINE 1 AND THE AIRCRAFT WAS FOUND SAFE FOR FERRY TO CMH. CMH MAINTENANCE REPLACED THE FAN SHAFT PLUG. ENGINE RUNS SHOWED NO SIGNS OF OIL LEAKS AND NO HAZE OR SMOKE WAS PRESENT. THE AIRCRAFT WAS RETURNED TO SERVICE.