As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED A GEAR DISAGREE CAS MESSAGE AFTER TAKEOFF. THE NOSE GEAR WOULD NOT COME UP. THE ACFT RETURNED TO DEPARTURE AND LANDED WITHOUT INCIDENT. MX INSPECTED THE NLG AND REMOVED AND REPLACED THE NLG PRIORITY VALVE. OPS CHECKS WERE PERFORMED IAW THE ACFT MM. NO FURTHER DEFECTS WERE NOTED AND THE ACFT WAS RELEASED FOR SERVICE.