As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED ELECTRICAL SMOKE SMELL THROUGHOUT THE CABIN. EMERGENCY DECLARED, FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RECIRCULATION FAN FILTERS AND ACCOMPLISHED PACK BURN. SYSTEM GROUND CHECK NORMAL OPERATION.