As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) LANDING GEAR POSITION SWITCHES INTERNAL CONTACTS ARE KNOW TO DEVELOP HIGH RESISTANCE. MANUFACTURER HAS A AMM PROCEDURE AND SPECIAL TOOLING TO TEST AND CLEAN INTERNAL CONTACTS. THE PROCEDURE IS ONLY RECOMMENDED AS A TROUBLESHOOTING PROCEDURE, NOT A REGULARLY SCHEDULED EVENT. (TC# 20151116014)