As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE GEAR UPLOCK SWITCH PLUNGER CRACKS AT INSERT (PLASTIC). SECOND AIRCRAFT IN LAST YEAR WITH THIS PROBLEM DISCOVERED DURING ANNUAL INSPECTION. THIS CRACKING PERMITS MOISTURE INSIDE THE HOUSING CAUSING ERRONEOUS UNLOCK INDICATIONS IN COCKPIT WHEN GEAR IS ACTUALLY UP AND LOCKED.