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 AN AMBER STAB TRIM FAIL CAS MESSAGE POSTED ON TOP OF DESCENT. THE MAINTENANCE VENDOR TROUBLESHOT AND DETERMINED THE STABILIZER TRIM ELECTRONIC CONTROL MODULE WAS FAULTY. THE UNIT WAS REMOVED AND A REPAIRED UNIT WAS INSTALLED. OPS CHECKS WERE SATISFACTORY. AIRCRAFT THEN WAS RETURNED TO SERVICE.