As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA FLIGHT 3372 THE CREW REPORTED THE NOSE GEAR WOULD NOT STAY RETRACTED AFTER TAKEOFF FROM BNA. THE AIRCRAFT RETURNED TO BNA AND LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AND REPLACED THE NOSE GEAR UPLOCK BOX ASSEMBLY. OPERATIONAL CHECKS WERE GOOD.