As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 331 - EN ROUTE TO PIT FROM MCI A 'WARN COMPUTER INOP' MESSAGE ILLUMINATED ON THE MULTI FUNCTION DISPLAY. DUE TO ICING CONDITIONS AT PIT, THE FLIGHT DIVERTED TO CLT. THE FLIGHT CREW DECLARED AN EMERGENCY. THE FLIGHT LANDED CLT WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE FLIGHT WARNING COMPUTER. (M)