As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PDX-ENROUTE, FLIGHT ATTENDANTS COMPLAINED OF AN ODOR TOWARDS THE REAR OF THE CABIN CAUSING THEIR EYES TO BURN AND FELT SICK. GROUND RAN BOTH ENGINES. NO SMELLS NOTICED IN BLEED SYSTEM. HAD LAVATORY SERVICED, NO SMELLS NOTICED AT THAT TIME. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.