As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOWERED GEAR HANDLE AND ONLY LEFT MAIN GEAR ILLUMINATED DOWN. RAN GEAR EXTENSION CHECKLIST AND STILL ONLY INDICATED LEFT MAIN DOWN. LANDING WAS UNEVENTFUL. REPLACED INDICATOR LIGHT BULBS WITH NEW AND PERFORMED LANDING GEAR RETRACTION TEST IAW HAWKER 400XP MM CHAPTERS 32-20 AND 32-00.