As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AIRCRAFT RETURNED TO BASE WITH GEAR INDICATION PROBLEMS. PROXIMITY SENSOR ON RT GEAR EXTENDED WITH OVERRIDE. ON INVESTIGATION, PIN HOLE FOUND IN RED WIRE INSULATION ON SENSOR WITH WATER CONTAMINATION. HEAT SHRINK WAS INSTALLED OVER EACH WIRE TO SOLVE PROBLEM. WIRE VERY DIFFICULT TO ROUTE.