As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD INFLIGHT T363 - GEAR DOOR OPEN LIGHT ILLUMINATED WITH GEAR UP. NO OTHER GEAR LIGHTS ON. USED ALTERNATE GEAR EXTENSION. LANDED ORD WITHOUT INCIDENT. FOUND RIGHT GER DOOR TARGET AND BRACKET BROKEN. REPLACED GEAR DOOR TARGET AND BRACKET. SYSTEM GROUND CHECKED NORMAL OPERATION.