As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA CREW REPORTED SMOKE IN THE CABIN DURING DESCENT. EMERGENCY DECLARED FLIGHT LANDED MIA WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND CAPTAINS RADIO ALTIMETER PRODUCING THE SMOKE. REPLACED LT RADIO ALTIMETER, SYSTEM GND CHECKED NORMAL OPERATION CLOSED.