As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED: SMOKE LAVATORY INDICATION INTERMITTENT DURING FLIGHT NO SMOKE OR FIRE INDICATIONS. TROUBLE SHOOTING FOUND LAVATORY 4F-R SMOKE DETECTOR FAULTY. REMOVED AND REPLACED LAVATORY SMOKE DETECTOR AT LAVATORY 4F-R PER AMM 26-13-01.