As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOXIOUS OILY FUMES FROM AIR CONDITIONING SYSTEM ON GROUND AND IN THE AIR. SOME PASSENGERS AND FLIGHT ATTENDANTS WERE NAUSEATED. FUMES REALLY STRONG WHEN IN RAINY CONDITIONS. SUPPLEMENTAL DATA UPDATE COULD NOT FIND SOURCE OF ODOR OR DUPLICATE PROBLEM. REPLACED COALESCER BAGS AS A PRECAUTIONARY ACTION.