As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ELECTRICAL ODOR NOTICED BY F/AS BETWEEN ROWS 20 AND 30. ALL OVERHEAD LIGHTS WERE TURNED OFF AND ODOR DISAPPEARED. TURNED ALL OVERHEAD LIGHTS ON FOR 1.5 HRS. UNABLE TO DETECT ODOR. SUSPECT INDIRECT CEILING LIGHTS BALLAST ABOVE SEATS 20-21AB. REPLACED SAME. OPS CHECK NORMAL.