As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JUST AFTER TAKEOFF THE CREW REPORTED A LAV SMOKE INDICATION ON EICAS, AND SMOKE IN THE LAVATORY. THE AIRCRAFT RETURNED TO LGA AND LANDED WITHOUT INCIDENT. MAINTENANCE PERFORMED ENGINE RUNS AND AIR CONDITIONING PACK OPS CHECKS WITH NO SMOKE OR ODORS NOTED. THE LAVATORY COURTESY LIGHT BULBS WERE FOUND BROKEN AND WERE PLACED ON MEL. THE LAV LIGHT MEL WAS CLEARED IN CMH ON 7/14/10 WITH THE REPLACEMENT OF THE LAVATORY COURTESY LIGHT BULBS.