As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLIGHT, THE FLIGHT ATTENDANT REPORTS A CONSTANT OILY ODOR IN THE PAX CABIN & ALSO REPORTS THAT ONE OF THE FLIGHT ATTENDANTS BECAME ILL AS A RESULT. FLIGHT LANDED WITHOUT INCIDENT. NO KNOWN PAX ILLNESSES OCCURRED AS A RESULT. ACCOMPLISHED CABIN AIR QUALITY TROUBLESHOOTING JC 26L0021001 WITH NO SMELL NOTED. ACFT RETURNED TO SERVICE.