As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3570 DURING CLIMB THE CREW REPORTED RECEIVED A LANDING GEAR DISAGREE MESSAGE. THE GEAR WOULD NOT COME UP WHEN HANDLE WAS SELECTED IN THE UP POSITION. THE CREW ELECTED TO RETURN TO XNA AND LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REMOVED AND REPLACED THE LANDING GEAR SELECTOR VALVE IAW CRJ700 AMM 32-32-10. OPERATIONAL CHECK GOOD IAW AMM 32-30-00-710-801. THE AIRCRAFT RETURNED TO SERVICE.