As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 5643- EN ROUTE FROM BOS TO CMH RECEIVED RIGHT COWL ANTI-ICE MESSAGE WITH ANTI-ICE SELECTED OFF. COMPLIED WITH QRH, CREW THEN DECLARED AN EMERGENCY AND DIVERTED TO GSO AND LANDED SAFELY. REMOVED AND REPLACED RIGHT COWL ANTI-ICE PRESSURE SWITCH.