As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 2353 - EWR - FLIGHT CREW REPORTED BURNING SMELL IN CABIN DURING ENTIRE FLIGHT, BUT IT WAS UNNOTICED IN THE FLIGHT DECK. EWR MX RAN PACKS WITH APU BLEED AND ENGINE BLEEDS AT VARIOUS POWER SET AND INSPECTED NR 2 PACK AREA AND CABIN LIGHTING, BUT COULD NOT DUPLICATE THE SMELL. ACFT WAS APPROVED TO RETURN TO SERVICE.