As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - AFTER START, FLIGHT ATTENDANT ADVISED FLIGHT US OF A HEAVY TOXIC ODOR IN CABIN. CHECKED SERVICE LEVEL OF ACM OILS, COCKPIT SLIGHTLY OVERSERVICED, ADJUSTED LEVEL. CHECKED ACM COOLINR INLET & OUTETS. NO DISCREPANCIES NOTED. GROUND RAN ENGINE AND BOTH PACKS. NO ABNORMAL ODORS. COULD NOT DUPLICATED. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.