As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 3355 - ON APPROACH TO DTW, THE RIGHT MAIN GEAR DIDN'T INDICATED DOWN AND LOCKED AFTER GEAR EXTENSION. THE CREW CYCLED THE GEAR UNTIL A DOWN INDICATION WAS RECEIVED. MAINTENANCE CLEANED AND LUBED THE RIGHT GEAR POSITION SWITCHES. ALL CHECKS SATISFACTORY. (M)