As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE, REPORTS OF ELECTRIC ODOR FROM ROWS 27-29ABC. TURNED OFF BOTH UTIL BUSSES AND LT REC FAN, ODOR DISSIPATED. RESTORED L RECIR - OK. RESTORED R AND L UTIL BUSS, ODOR RETURNED. IRO/ TURNED ON ALL LIGHTS AND IFE WITH UTIL SWITCHES. LT AND RT REC FANS ON. NO ELECTRICAL ODOR IN CABIN BETWEEN ROWS 27 THRU 29 ABC. INSPECTED WIRING UNDERNEATH SEATS. NO TROUBLE FOUND.