As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT THE FWD LAV SMOKE MESSAGE BRIEFLY ILLUMINATED AND WENT AWAY WITHIN 10 SECONDS. NO EVIDENCE OF SMOKE/FIRE/FUMES EXISTED. REMOVED FROM SERVICE. PERFORMED LAV (FWD) SMOKE DETECTOR SYSTEM TEST/CHECKING, PER AMM 26-14-01-700-801-A. SYSTEM TEST GOOD. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.