As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HOU - FLT 639 - DURING APPROACH WHEN LANDING GEAR WAS EXTENDED, NOSE LANDING GEAR UNSAFE LIGHT REMAINED ILLUMINATED. CYCLED LANDING GEAR. FOUND BROKEN WIRE AT NOSE LANDING GEAR DOWNLOCK SENSOR. MADE AIRWORTHINESS REPAIR TO WIRING. NOSE LANDING GEAR INDICATION THEN CHECKED NORMAL. CHECK C - 6-2-96 - STL.