As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED SLAT LOW RATE MESSAGE AT FL200. DETECTED AN ELECTRICAL SMOKE ODOR. NO SMOKE WAS VISIBLE AND ODOR STARTED TO DISSIPATE, DONNED OXYGEN MASKS, RETURNED TO DEPARTURE, DECLARED AN EMERGENCY AND RAN QRH. LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND FOUND THE NR 1 SFACE DAMAGED WITH MELTED METAL. MAINTENANCE R & R THE NR 1 SFACE IAW AMM AND OPS CHECKED GOOD. ACFT IS GOOD FOR SERVICE.