As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
15 MINUTES AFTER TAKEOFF, THERE WAS A PRIMARY TRIM FAIL CAS MESSAGE FOLLOWED BY A MACH TRIM FAULT AND SECONDARY TRIM FAULT. AN EMERGENCY WAS DECLARED BY THE FLIGHT CREW AND THE ACFT RETURNED TO DEPARTURE WITHOUT INCIDENT. TROUBLESHOOTING INDICATES A DISCREPANCY WITH THE HORIZIONAL STAB ACTUATOR.