As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - AFTER TAKEOFF, GEAR DOOR LIGHT FOR THE LEFT MAIN GEAR DOOR REMAINED ON. AFTER CHECKLIST, LIGHT STAYED ON. CONTINUED TO DESTINATION. PERFORMED ALTERNATE EXTENSION AND ACCOMPLISHED A UNEVENTFUL LANDING. AIRCRAFT FERRIED TO PDX FOR REPAIRS. REPLACED THE BUSHINGS AND LOC-LINK AND THE SOLENOID SEQUENCE VALVE. ALSO FLUSHED THE HYDRAULIC SYSTEM. EXTENSION AND RETRACTION OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.