As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CVG/DTW - FLT 3409 - DURING DEPARTURE FROM CVG, RT MLG INTRANSIT LIGHT DID NOT ILLUMINATE WHEN LANDING GEAR WAS RETRACTED. THE AIRCRAFT CONTINUED TO DTW. MAINTENANCE CLEANED THE LANDING GEAR INTRANSIT MICROSWITCH. THE SYSTEM FUNCTIONED SATISFACTORILY. (X)