As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LAV SMOKE AFTER TAKEOFF AND RETURNED TO FIELD. MAINTENANCE TROUBLESHOT THE FAULT TO THE NR 1 PACK AND PLACED ON MEL. THE NR 1 PACK MEL WAS CLEARED IN CMH ON 6/9/2010. THE NR 1 PACK WAS RUN AT MULTIPLE TEMP RANGES IAW EMB 145 AMM 21-51-00, NO SMOKE OR SMELL WAS NOTED IN THE CABIN AND THE MEL WAS CLEARED.