As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6598 - IAD-RDU - DURING CLIMB, AIRCRAFT MADE AN UNSCHEDULED LANDING AT RDU DUE TO CABIN DOOR WARNING LIGHT ILLUMINATED. AIRCRAFT WENT TO GATE WITH NO FURTHER PROBLEMS. MAINTENANCE INSPECTED AND CLEANED AND LUBRICATED PASSENGER DOOR MICROSWITCH. OPS CHECK OK. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)