As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PREVIOUS CREW & SEVERAL FLIGHT ATTENDANTS REPORTED OILY, ACRID CABIN ODOR THROUGHOUT CABIN. ODOR WAS SMELLED WITH APU OFF AS WELL AS WITH EXTERNAL AIR. ONE CREW MEMBER FELT DIZZY WITH TINGLING SENSATION. TROUBLE SHOT CABIN AIR QUALITY IAW JC 26L00021001. RAN ENGS FOR 5 MINUTES & RAN APU WITH PACKS ON WITH NO SMELLS NOTED.