As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN ATTEMPTING TO RETRACT THE LANDING GEAR, THE CREW RECEIVED A -GEAR DISAGREE- WARNING. THE QRH WAS FOLLOWED. THE FLIGHT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. AFTER TROUBLESHOOTING MAINTENANCE ADJUSTED THE LT NOSE LANDING GEAR LOCK POSITION PROXIMITY SENSOR. OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS THEN RELEASED FOR SERVICE.