As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 6520 - CHS-IAD - DURING CLIMB-OUT, RETURNED TO CHS DUE TO SMOKE IN THE COCKPIT DURING CLIMB. AN EMERGENCY WAS DECLARED AND FLIGHT CREW NOTICED THAT FLIGHT DIRECTOR FLAG AND SYSTEM WAS FAILED. AIRCRAFT LANDED AT CHS WITH NO FURTHER INCIDENTS. AIRCRAFT WAS THEN FERRIED TO IAS WHERE MX REPLACED THE FLIGHT CONTROL COMPUTER. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)