As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 4558 THE CREW REPORTED, DURING CRUISE NOTICED A SMOKE/BURNING ODOR IN THE FLIGHT DECK. THE CREW DECLARED AN EMERGENCY AND DIVERTED TO AVP. THE AIRCRAFT LANDED WITHOUT INCIDENT. THE AIRCRAFT WAS REMOVED FROM SERVICE. REMOVED AND REPLACED THE RECIRCULATION FAN IAW EMB AMM 21-26-02. THE OPERATIONAL CHECK WAS GOOD, NO ODOR NOTED. THE AIRCRAFT WAS RETURNED TO SERVICE.