As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN)PILOT FAILED TO GET AN INDICATION WHEN THE GEAR WAS SELECTED DOWN. EMERGENCY SELECTION WAS MADE AND THE AIRCRAFT LANDED SAFELY. INVESTIGATION FOUND THE DOWNLOCK BEARING HAD WORN TO THE POINT WHERE THE MICRO SWITCH TAB WAS ACTUALLY MISSING ITS CONTACT POINT.