As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A STRONG BURNING SMELL WHEN THE ANTI-ICE SYSTEM WAS ACTIVATED. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NR 2 RECIRCULATION FAN TO BE INOPERATIVE. THE AFFECTED FAN WAS REMOVED AND REPLACED AND THE RECIRCULATION SYSTEM OPERATIONALLY TESTED.