As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DEPARTURE CLIMB UPON FLAP RETRACTION, THE NR 8 LEADING EDGE SLAT REMAINED EXTENDED. FOLLOWED ASYMMETRICAL LEADING EDGE DEVICE PROCEDURE TO NO AVAIL. FLIGHT RETURNED TO BNA WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED THE NR 8 SLAT ACTUATOR. LEAK AND OPERATIONAL CHECK NORMAL.