As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW ADVISED THAT SMELLED SMOKE IN THE AFT CABIN SHORTLY AFTER TAKEOFF FROM LGA. FLIGHT DIVERTED TO AN UNEVENTFUL EMERGENCY LANDING AT JFK. MAINTENANCE FOUND ALL OF THE RECIRCULATION FAN CIRCUIT BREAKERS TRIPPED AND THE FAN IMPELLER JAMMED. AFTER THE RECIRCULATION FAN WAS REPLACED, AND THE FUNCTIONAL CHECK WAS GOOD, THE AIRCRAFT RETURNED TO SERVICE.