As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 6243, HSV TO CVG, DURING CRUISE THE AUTOPILOT DISENGAGED ASSOCIATED WITH PITCH TRIM MAIN AND BACKUP INOP MESSAGES ON EICAS. THE FLIGHT CREW PERFORMED THE APPROPRIATE QRH CHECKLISTS AND BOTH PITCH TRIM SYSTEMS BECAME OPERABLE AGAIN. THE FLIGHT LANDED WITHOUT INCIDENT IN CVG. MAINTENANCE CLEANED THE TRIM SWITCHES PER AMM 27-40-03 AND 24-40-04 AND THE TRIM SYSTEM OPERATED NORMALLY.