As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR 3156 - INBOUND TO DTW, THE RIGHT MAIN GEAR DID NOT EXTEND WHEN THE GEAR HANDLE WAS SELECTED DOWN. THE CREW RECYCLED THE GEAR AND IT EXTENDED NORMALLY. THE AIRCRAFT CONTINUED TO DTW AND LANDED WITHOUT INCIDENT. MAINTENANCE PERSONNEL FUNCTIONALLY TESTED THE LANDING GEAR SYSTEM, BUT WERE UNABLE TO DUPLICATE THIS DISCREPANCY. THE LANDING GEAR POSITION INDICATOR WAS REPLACED AS A PRECAUTION. (M)