As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH WHEN PUTTING GEAR DOWN WE GOT NORMAL 3 GEAR DOWN GREEN LIGHTS BUT ALSO A LEFT DOOR AMBER LIGHT. LANDED PER CHECKLIST. LANDING UNEVENTFUL. REMOVED AND REPLACED LT GEAR LOCK 1 (LGDLK1) PROXIMITY SENSOR IAW AMM 32-61-06. OP CHECKS GOOD. RETURNED TO SERVICE.