As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, THE CREW REPORTED THAT THE -LAV SMOKE- CAS MESSAGE HAD ILLUMINATED, NO SMOKE HAD BEEN DETECTED UPON INSPECTION. MAINTENANCE PERSONNEL PERFORMED A VISUAL INSPECTION FOR SMOKE WITH NO FINDINGS. DURING POWER UP OF THE AIRCRAFT THE CAS MESSAGE DID NOT REAPPEAR. THE AIRCRAFT WAS RETURNED TO SERVICE.