As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FLAPS WOULD NOT FULLY RETRACT AFTER TAKEOFF. THE FLAP HANDLE WOULD NOT STAY IN THE RETRACT POSITION. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE FLAP HANDLE CONTROL SPRING BROKEN. THE SPRING WAS REMOVED AND REPLACED, AN OPERATIONAL CHECK OF THE FLAPS WAS GOOD.