As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6562 - IAD-GSO - DURING CRUISE, MADE AN UNSCHEDULED LANDING DUE TO PASSENGER DOOR WARNING ILLUMINATED. AIRCRAFT RETURNED TO GATE WITH NO FURTHER PROBLEMS. MX INSPECTED AND REMOVED AND REPLACED TOP FORWARD MICROSWITCH, OPS CHECK OK. AIRCRAFT WAS RELEASED AND RETURNED TO SERVICE. (M)