As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN PITCH TRIM INOP EICAS MESSAGE IN CRUISE FLIGHT WITHOUT SELECTING A CHANGE OF TRIM AND A/P ON FO'S. T/S FOUND HOR STAB CTL UNIT FAILURE TWICE ON MFD, R&R STAB CTL UNIT IAW EMB 145 AMM 27-40-01 NO FIX. REMOVED PANEL 324EL CLEANED CP'S ON STAB ACTUATOR AS REQUIRED. OPS CHECK GOOD OK FOR SERVICE. REINSTALLED PANEL 324EL.