As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3479 - ON APPROACH TO DTW, THE RIGHT GEAR INTRANSIT LIGHT DID NOT ILLUMINATE DURING GEAR EXTENSION. ALL OTHER INDICATIONS WERE NORMAL. MAINTENANCE WAS UNABLE TO DUPLICATE THE DISCREPANCY. MX CLEANED AND LUBED THE RIGHT GEARS INDICATIONS SWITCHES. ALL CHECKS SATISFACTORY. (M)