As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR UNSAFE INDICATION, AFTER RETRACTION, RED LIGHT IN HANDLE. ACFT LANDED UNEVENTFULLY AT AIRPORT OF ORIGIN. IDENTIFIED & REPLACED A FAULTY NOSE GEAR UPLOCK INDICATION SWITCH, SWITCH WAS FOUND TO HAVE CONTAMINATION & CORROSION ON TERMINAL CONTACTS UNDER SEALANT ON END OF SWITCH CAUSING SHORTING BETWEEN TERMINALS & CASE. THIS IS A COMMON FINDING FOR FAILURES OF THIS PN. SWITCH FOR THIS OPERATOR.