As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 6383 - CMH-IAD - DURING CLIMB, MADE A UNSCHEDULED LANDING DUE TO PASSENGER DOOR CAPTION ILLUMINATING DURING CLIMB. AIRCRAFT RETURNED TO CMH AND GATE WITH NO FURTHER INCIDENTS. MAINTENANCE INSPECTED THE DOOR AND CYCLED IT THROUGH NUMEROUS TIMES, COULD NOT DUPLICATE. AIRCRAFT WAS RELEASED AND APPROVED FOR RETURN TO SERVICE. (M)