As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
Lav smoke detector went off shortly after departure. Captian returned to field, no smoke was detected. Lav smoke detector was replaced proir to this flight for same problem. MEL lav smoke detector, generated EO to pull and collar circuit breaker. Smoke detector replaced 1 MARCH 2003.