As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON APPROACH, CREW EXTENDED LANDING GEAR AND DID NOT GET 3 GREEN DOWN AND LOCK INDICATIONS. CREW THEN COMPLETED THE EMERGENCY CHECKLIST AND LANDED SAFELY WITHOUT FURTHER INCIDENT. MAINTENANCE TROUBLESHOT THE SYSTEM AND FOUND GROUNDING CIRCUIT BAD ON PCB. REMOVED AND REPLACED PCB A125.