As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT NR 3229, LAV SMOKE DETECTION SYSTEM ALARMED INTERMITTENT INFLIGHT. MAINTENANCE FOUND SYSTEM NEVER SHOWED A WARNING OG. CLEANED CANNON PLUG OF LAVATORY SMOKE DETECTOR. PERFORMED OPS CHECK OF SMOKE DETECTOR, IAW SF340 AMM 26-13-00-5. NO DEFECTS NOTED AT THIS TIME.