As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ON SHORT FINAL, RIGHT MAIN GEAR UNSAFE LIGHT, GEAR HANDLE LIGHT AND GEAR WARNING SOUNDED. LIGHT CYCLED BACK AND FORTH FROM GREEN TO RED. ALTERNATE EXTENSION CARRIED OUT. LANDING OK. RIGHT HAND DOWNLOCK SENSOR REPLACED ALONG WITH WIRING HARNESS.