As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN LANDING WAS LOWERED ON APPROACH RIGHT MAIN GEAR GREEN LIGHT DID NOT ILLUMINATE. CYCLED GEAR TWICE AND RIGHT GEAR GREEN LIGHT ILLUMINATED. RED LIGHT IN GEAR HANDLE WAS OUT. INSTALLED NEW LT MAIN GEAR DOWN LOCK SWITCH AND ADJUSTED IAW HAWKER 400XP MM 32-10-10. PERFORMED GEAR OPERATIONAL TEST IAW HAWKER 400XP MM 32-00-00, OPS CHECK GOOD.