As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6718 - ATL-IAD - DURING TAKEOFF, AIRCRAFT MADE AN UNSCHEDULED LANDING DUE TO LAV SMOKE WARNIGN LIGHT ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND FERRIED AIRCRAFT TO IAD WHERE MAINTENANCE REMOVED AND REPLACED SMOKE DETECTOR, OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)