As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - DURING APPROACH EXTENDED LANDING GEAR AND GEAR DOOR OPEN REMAINED ILLUMINATED. TOWER ADVISED GEAR DOORS MAIN WRE OPEN. WENT AROUND AND ACCOMPLISHED GEAR DOOR OPEN LIGHT QRH, NO HELP. REPLACED BOTH MAIN LANDING GEAR DOOR PADS. SYSTEM GROUND CHECKED NORMAL OPERATION.