As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF "LAV SMOKE WARNING" ODOR OF SMOKE IN COCKPIT AND CABIN FLIGHT ATTENDANT VERIFIED NO FIRE IN LAV BUT COULD STILL ODOR SMOKE. CW GVI OF LAV SIDE WALL AND IN THE LAV GVI OF ENGINE AND RAN BOTH ENGINE TO TAKE POWER. ALL CHECK GOOD AIRCRAFT RETURNED TO SERVICE.