As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMELLS LIKE ELECTRICAL SMOKE COMING FROM OVERHEAD VENT NEAR ROW 17. FOUND FLOUR BULB CONTACTS BURNED AT ROW 18 RIGHT SIDE. REPLACED BALLAST AT ROW 17 FOR LAMPS 17-18 RIGHT SIDE. REPLACED FWD LAMP HOLDER DUE TO SAME BEING BURNED. NEW BULB AND SHIELD INSTALLED. OPS CKS GOOD, (BELIEVE HOLDER WAS SOURCE OF SMOKE, BALLAST CHANGED AS PRECAUTION.)