As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, AP A FAIL CAS MESSAGE POSTED FOLLOWED 30 SECONDS LATER BY AP B FAIL CAS MESSAGE. BOTH MESSAGES REMAINED ON THE RESET OF THE FLIGHT REPEAT WRITE-UP. REVIEWED CDMS FAULTS, FOUND PITCH TRIM FAULT ON LAST FLIGHT. REMOVED AND REPLACED HORIZ STAB TRIM CONTROL UNIT IAW MM CHAPTER 27-40-00. EICAS STAB RIGGING CHECKS GOOD. OPS CHECKS GOOD.