As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
GREEN NOSE GEAR DOWN AND LOCKED LIGHT REMAINED ON AFTER GEAR WAS RETRACTED. NO HORN AND NO RED LIGHT AFTER GEAR EXTENDED. TROUBLESHOOTING INDICATED THAT POSITION SWITCH FAILED IN THE DOWN AND LOCKED POSITION, THIS FAILURE INDICATED DOWN AND LOCKED NO MATTER WHAT THE POSITION OF GEAR.