As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLIGHT CREW REPORTED THAT A CAS MESSAGE WAS DISPLAYED ON DECENT INDICATING A FAULT WITH THE LEFT COWL VALVE IN THE OPEN POSITION. THE MAINTENANCE TEAM TROUBLESHOT AND FOUND THAT THE LEFT COWLING ANTI-ICE VALVE HAD FAILED. THE FAILED VALVE WAS REMOVED AND A NEW VALVE WAS INSTALLED. OPERATIONAL CHECKS WERE SATISFACTORY. THE AIRCRAFT WAS RETURNED TO SERVICE.