As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FA'S REPORTED BURNING ODOR IN CABIN. RETURNED TO EWR. PERFORMED OPS CHECK OF APU, ALL CHECKS GOOD. PERFORMED OPS CHECK BY MEANS OF RUNNING ENG 1 AND 2, COULD NOT DUPLICATE ODOR. NO DEFECTS NOTED IAW AMM 49-10-00 AND GE 72-00-00.