As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - DURING CRUISE AT 25,000, OBSERVED AMBER "L DOOR" AND "R DOOR" TRANSIT LIGHTS AS WELL AS RED "LEFT" AND "RIGHT" GEAR UNSAFE LIGHTS. LIGHTS ILLUMINATED TWICE FOR 1-4 SECONDS. RAN ALTERNATE GEAR EXTENSION E/A CHK LIST. PERFORMED ALTERNATE EXTENSION AND UNEVENTFUL LANDING. REPLACED THE LANDING GEAR SELECTOR VALVE. GEAR SWING FUNCTIONAL CHECK GOOD. RETURNED TO SERVICE.