As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CLT - FLT 5205 - AFTER DEPARTING, THE DOOR WARNING CAPTION LIGHT CAME ON. AIRCREW DID NOT DECLARE AN INFLIGHT EMERGENCY. AIRCRAFT RETURNED TO CHARLOTTE, WITH NO OTHER PROBLEMS. MAINTENANCE INSPECTED THE DOOR LOCKS AND MICROSWITCHES. DOOR ALIGNMENT MARKING CHECKED GOOD. DOOR WAS OPENED AND CLOSED SEVERAL TIMES. DOOR WAS DEFERRED TO MSL. (M)