As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT CREW REPORTED LANDING GEAR DOOR DOWN INDICATION AFTER GEAR EXTENDED. PERFORMED EMERGENCY PROCEDURE AND LANDED WITH GEAR DOORS DOWN. FOUND LEFT GEAR DOOR CLOSED TARGET MISSING AND SUPPORT BROKEN. REPLACED DOOR POSITION SENSOR AND BRACKET. SYSTEM GROUND CHECK NORMAL OPERATION.