As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR DOWN. MAIN GEAR INDICATIONS GEAR IN TRANSIT. BOTH GREEN & RED LIGHTS ON. I PHYSICALLY TAPPED THE GEAR HANDLE AND THE LIGHTS WENT GREEN. THE UPPER GEAR LIGHTS WERE GREEN THE ENTIRE TIME. WE RECEIVED A TOO LOW GEAR GPWS AT 400 FEET / DEFECT TRANSFERRED TO NON ROUTINE CARD D167076. LANDING GEAR CONTROL LEVER MODULE REPLACED. REF NRC D167076 FOR WORK PERFORMED.