As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR FLIGHT 2261 THE CREW REPORTED SMOKE IN CABIN AFTER TAKEOFF. THE AIRCRAFT RETURNED TO EWR AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED AND PERFORMED FAULT ISOLATION PROCEDURES IAW 21-20-00-810-801A. RAN ENGINES, PACKS AND APU AT TAKEOFF POWER AND AT VARIOUS SETTINGS. CHECKED LIGHTING AND CABIN ELECTRICAL COMPONENTS AND NO DEFECTS WERE FOUND. THE AIRCRAFT WAS RELEASED FOR SERVICE.