As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED THE NOSE GEAR WOULD NOT RETRACT, A GEAR DISAGREE CAS MESSAGE AND A PROXIMITY SYSTEM FAULT 1 STATUS MESSAGE AFTER TAKEOFF FROM DAY. AIRCRAFT RETURNED TO DAY AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE AIRCRAFT, REMOVED AND REPLACED THE NLG LOWER TORQUE-LINK AND PERFORMED CHECKS USING THE AIRCRAFT MAINTENANCE MANUAL. AIRCRAFT WAS RELEASED FOR SERVICE.