As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED AFTER TAKEOFF FROM CLT THAT THE NOSE LANDING GEAR WOULD NOT RETRACT. THE AIRCRAFT RETURNED TO CLT AND LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED THE NOSE GEAR AND FOUND THE NLG LOCK PIN INSTALLED. THE NLG LOCK PIN WAS REMOVED IAW THE AIRCRAFT MAINTENANCE MANUAL. NO FURTHER DEFECTS WERE NOTED. THE AIRCRAFT WAS RELEASED FOR SERVICE.