As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON GEAR HANDLE RETRACTION ON TAKEOFF, NO GEAR MOVED AND RECEIVED GEAR DISAGREE MASTER WARNING MSG. RAN QRH NO LIMITATIONS EXCEEDED AND LANDING IN CLT WAS UNEVENTFUL. MAINTENANCE INSPECTED, REMOVED, AND REPLACED LANDING GEAR SELECTOR VALVE. OPERATIONAL CHECKS WERE MADE PER THE AIRCRAFT MAINTENANCE MANUAL AND AIRCRAFT WAS RELEASED FOR SERVICE. NO FURTHER DEFECTS HAVE BEEN NOTED SINCE THE FLIGHT.