As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING GEAR EXTENSION WAS SELECTED, RECEIVED A "GEAR DOOR OPEN" INDICATION AFTER THE MLG WAS DOWN AND LOCKED. AIRCRAFT FERRIED TO ATL. ATL MAINTENANCE PERFORMED INSPECTION AND OPS CHECKS WITH GEAR SWINGS. COULD NOT DUPLICATE THE PROBLEM. NO DEFECTS NOTED.