As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON FLIGHT 3680 (MSP TO CVG) THE AIRCRAFT PERFORMED AN AIR RETURN FOR NOSE GEAR NOT RETRACTING. THE CREW FOLLOWED THE QRH PROCEDURES AND LANDED. THE NOSE LANDING GEAR PROXIMITY SENSOR BRACKET WAS FOUND BENT. THE STRUT ALSO REQUIRES SERVICING. REMOVED AND REPLACED NOSE CENTERING PROX SENSOR BRACKET.