As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STC - FLT 3491 - DURING APPROACH, CREW NOTED NOSE GEAR GREEN DOWN AND LOCKED LIGHT DID NOT ILLUMINATE AFTER GEAR EXTENSION. THE CREW ELECTED TO RETURN TO MSP, AND AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL REPLACED THE LT AND RT NOSE DOWN AND LOCKED SWITCHES. ALL SYSTEMS OPERATED SATISFACTORILY. (X)