As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 580 - EN ROUTE TO DSM, NOSE GEAR LIGHT FAILED TO ILLUMINATE WHEN THE GEAR WAS EXTENDED. GEAR WARNING HORN SOUNDED CONTINUOUSLY. AIRCRAFT LANDED DSM SAFELY AND WITHOUT INCIDENT. FOUND GROUND WIRE ON NOSE GEAR LOCK SWITCH BROKEN. REPAIRED GROUND WIRE AND SYSTEM TEST NORMAL. (M)