As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE R/H MLG WOULD NOT RETRACT AND THE GEAR DOOR AMBER LIGHT REMAINED ILLUMINATED.AFTER TAKEOFF FROM EWR. THE LEFT MAIN AND NOSE GEAR WERE SLOW TO RETRACT AND THE R/H MAIN REMAINED DOWN DURING GEAR RECYCLING. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED THE R/H MLG ACTUATOR CYLINDER AND RESTRICTOR PER MM 32-32-02. LEAK AND OPERATIONAL CHECKS WERE GOOD.