As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SOON AFTER TAKEOFF BOTH FLIGHT ATTENDANTS REPORTED SMELLING SMOKE AND A HAZE IN THE CABIN. NO MESSAGED APPEARED ON EICAS. JUST PRIOR TO LANDING BACK IN ICT THE FAS SAID THE SMELL AND HAZE HAD DISAPPEARED. LANDED IN ICT AND THE FIRE DEPARTMENT INSPECTED US ON THE RUNWAY AND IN THE GATE AND DIDN€™T SEE ANYTHING (FLIGHT 4858 - FILED OPEN) THIS IS CURRENTLY A WORK IN PROGRESS