As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE FLT ATTENDANT CALLED AND REPORTED A STRONG ACRID SMELL STRONGEST NEAR ROW 3. NO ABNORMAL INDICATIONS NOTED. TURNED OFF GASPER FAN SMELL DISSIPATED (DISAPPEAR) ON APPROACH SMELL CAME BACK. NO VISABLE SMOKE. REMOVED AND REPLACED GASPER FAN PER M/M.