As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5666 - EN ROUTE CVG-EWR RECEIVED A MACH TRIM/STAB TRIM AND CARGO OVERHEAT MESSAGE, CREW DECLARED AN EMERGENCY AND DIVERTED TO CLE. FLIGHT LANDED WITHOUT INCIDENT. CLEANED CUTOUT SWITCHES AND PERFORMED A FUNCTIONAL CHECK OF THE HSTCU, NO DISCREPANCIES NOTED.