As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NOSE LANDING GEAR RED UNSAFE LIGHT ILLUMINATED ON APPROACH INTO DTW. LIGHT EXTINGUISHED WHEN GEAR WAS EXTENDED. EMERGENCY EQUIPMENT WAS CALLED OUT AS A PRECAUTION AND AIRCRAFT LANDED SAFELY WITHOUT INCIDENT. REPLACED NOSE GEAR UPLOCK SENSOR AND PROXIMITY CONTROL BOX. OPERATIONAL CHECK GOOD. AIRCRAFT RETURNED TO SERVICE.