As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM CAE TO CVG, CREW NOTICE ELECTRICAL SMELL COMING FROM THE GP300 AUTO PILOT PANEL. AN EMERGENCY WAS DECLARED WITH ATC; FLIGHT RETURNED TO POINT OF DEPARTURE AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE PERSONNEL REMOVED AND REPLACED THE GP300 AUTO PILOT PANEL AND AIRCRAFT WAS RELEASED FOR RETURN TO SERVICE.