As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT THE CREW REPORTED AN OPEN ACCESS DOOR. THE FLIGHT RETURNED TO ATL AND LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE AC ELECTRICAL GROUND POWER DOOR OPEN. THE DOOR AND FUSELAGE WERE INSPECTED AND NO DISCREPANCIES WERE FOUND. THE DOOR WAS PROPERLY SECURED AND THE AIRCRAFT WAS RELEASED FOR SERVICE.