As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TO PASSING 3000 FT FLIGHT ATTENDANT REPORTED SMOKE IN CABIN. RETURNED TO NEWARK. SMOKE SEEMED TO BE MOVING FROM FORWARD CABIN AFT SMOKE DISSIPATED AFTER APPROXIMATELY 5 MINS. PERFORMED DUCT BURNOUT. FOUND APU INLET CONTAMINATED. REPLACED COALESCER BAGS.