As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT RETURNED TO GATE AFTER FLIGHT ATTENDANT REPORTED HOT ELECTRICAL ODOR AND HAZY APPEARANCE IN CABIN FROM ROW 31 BACK. MAINTENANCE CHECKED AFT GALLEY AND LAVATORIES. RAN APU AND ENGINES, NO FAULTS NOTED AND NO HAZE OR ELECTRICAL ODOR NOTED IN CABIN. AIRCRAFT OK FOR SERVICE.