As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURN BACK IN CRUISE BOTH RED & GREEN NOSE GEAR LIGHTS ILLUMINATED WITH GEAR HANDLE IN OFF POSITION GREEN NOSE GEAR ILLUMINATED WITH GEAR HANDLE UP NO RED, THREE GREENS NO RED WITH GEAR HANDLE IN DOWN POSITION. R & R M983 CIRCUIT CARD IAW MM.