As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1000 (KIAH/FNLU) ITEM: DURING FLIGHT, SMOKE/FUMES IN CABIN IN VICINITY OF ROW 16 & 17. MAINTENANCE FOUND LARGEST ACTUATOR AT SEAT 18G AS SOURCE OF ELECTRICAL ODOR. DEACTIVATED CONTROL BOX FOR SEATS 18 D&G BY STOWING CONNECTORS AND PULLED C/B. REMOVED AND REPLACED SEAT ASSY PER MD-11 MM 26-21-01. (A)