As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BNA - FLT 2278 THE CREW REPORTED THAT THE NOSE GEAR DOORS DID NOT CLOSE UNTIL REACHING AN ALTITUDE OF 11,000 FT. MAINTENANCE REMOVED AND REPLACED THE NLG UPLOCK PROXIMITY SWITCH. THE LANDING GEAR DOORS WERE OPERATIONALLY CHECKED AND THE AIRCRAFT RETURNED TO SERVICE.