As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE NLG WOULD NOT RETRACT AFTER TAKEOFF FROM EWR. QRH PROCEDURES WERE FOLLOWED WITH NO CHANGE IN RESULTS. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE NLG SHOCK STRUT OUTER CYLINDER IAW MM 32-21-02, PAGE 401/801.. THE GEAR WAS SWUNG SEVERAL TIMES WITH NO DEFECTS NOTED.