What was found
CVG - FLT 4275 - DURING TAKEOFF, THE CREW REPORTED A LAVATORY SMOKE INDICATION ACCOMPANIED BY THE ODOR OF SMOKE. THE CREW PERFORMED AN AIR RETURN AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED APU AND ENGINE RUN-UPS, OPERATIONAL CHECKS OF BLEED AIR AND AIRCONDITIONING SYSTEMS AND OPERATIONAL TEST OF THE LAVATORY SMOKE DETECTOR (REF EMB145 AMM 26-14-00). NO DEFECTS WERE NOTED AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. (M)