As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED ALL MLG GREEN LIGHTS ILLUMINATED AND GEAR UNSAFE LIGHT ILLUMINATED IN-FLIGHT. EMERGENCY EXTENSION PERFORMED, NO CHANGE IN INDICATOR STATUS. AIRCRAFT LANDED WITHOUT INCIDENT. TROUBLESHOOTING REVEALED HIGH RESISTANCE IN THE NLG UPLOCK CIRCUITRY. FURTHER INVESTIGATION FOUND SEVERAL BURNED WIRES IIN THE HEATER BAY. WIRE REPAIRED, GEAR OPERATONAL CHECK SATISFACTORY.