As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BTV - INFLIGHT BOS-ORD. CREW REPORTED STRONG ELECTRICAL ODOR IN COCKPIT AND CABIN. EMERGENCY DECLARED LANDED BTV WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND RECIRCULATION FAN HAD OVERHEATED. REPLACED RECIRCULATION FAN AND RELAY. SYSTEM GROUND CHECKED NORMAL OPERATION.