As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 4433 - CREW REPORTED THAT AFTER TAKEOFF LAV SMOKE WARNING CAME ON EICAS. CREW FOLLOWED AOM PROCEDURE AND RETURNED TO ORD. LAV SMOKE WARNING LIGHT WENT OUT DURING APPROACH, BUT NOTED NO BURNING SMELL IN LAV AREA. REMOVED AND REPLACED LAV SMOKE DETECTOR IAW AMM. OPS CHECK GOOD. (M)