As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6483 - IAD-CHS - DURING CLIMB, AN UNSCHEDULED LANDING DUE TO MAIN CARGO SMOKE WARNING LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE REMOVED AND REPLACED SMOKE DETECTOR, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)