As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MCO - FL1535 - ON CLIMB-OUT FROM MCO, THE AFT CARGO DOOR WARNING LIGHT ILLUMINATED. CREW WAS UNCERTAIN IF THE DOOR WAS AJAR AND/OR NOT FULLY CLOSED SO THEY ELECTED TO RETURN TO FIELD AT MCO WHERE THE FLIGHT LANDED WITHOUT FURTHER INCIDENT. MAINTENANCE REMOVED AND REPLACED THE AFT CARGO DOOR PROXIMITY SENSOR. OPERATIONAL CHECK GOOD. (M)