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 ON ENGINE INDICATING AND CREW ALERTING SYSTEM REAR LAVATORY ON AIRCRAFT RIGHT HAS AURAL ALARM. NO EVIDENCE OF SMOKE. ACCOMPLISHED OPERATIONAL TEST OF LAVATORY 4F-R SMOKE DETECTOR PER AMM 26-13-00 AND SELF TEST PER AMM 26-13-00. OPERATIONS CHECK NORMAL.