As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL RED & GREEN LANDING LIGHT INDICATORS REMAINED ILLUMINATED WITH GEAR HANDLE DOWN. TRIED TO RESEAT HANDLE WITH NO EFFECT. RECYCLED GEAR & RECEIVED A SAFE INDICATION FOR LANDING. FOUND DEBRIS ON GEAR HANDLE AND PIN NOT SECURED AT CONNECTOR D4. SECURED PIN AT CONNECTOR D4096P PER MM.