As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE TO ATL FLT ATTENDANTS NOTICED OR SMELLED SMOKE COMING FROM SEATS 4AB. MAINT OPENED SEAT AND DISCOVERED THAT ONE OF THE HARNESSES TO SDU WAS SHOWING CHAR MARKS. ERA USED TO DISCONNECT THE HARNESS 14-472162-14. REMOVED AND REPLACED SDU HARNESS / PIN RD-KM 6264-11. HARNESS ASSEMBLY DISC TO SDU ARM CONNECTOR / P/N RD-KM 6263-01 AND DC-SEB / P/N RD-FA 3124-01. REMOVED MCO AND PLACARD. OPS CK GOOD. HARNESS REPLACED PER ERA 14-472162-14.