As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS DURING APPROACH WHEN LANDING GEAR WAS SELECTED DOWN RED AND GREEN LIGHTS ILLUMINATED ON MAIN PANEL, OVERHEAD PANEL SHOWED 3 GREEN LIGHTS. AFTER GO AROUND, GEAR WAS CYCLED AND NORMAL LANDING GEAR INDICATION DISPLAYED. MAINTENANCE PERFORMED LANDING GEAR POSITION INDICATING AND WARNING SYSTEM CHECKS IAW AMM 32-61-00. NO DEFECTS FOUND.