As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RED NOSE GEAR UNSAFE LIGHT REMAINED ILLUMINATED AFTER GEAR RETRACTION. GEAR RECYCLED. ABNORMAL COMPLIED WITH FOR RETURN FLIGHT TO ILN. REMOVED AND REPLACED PROX. CONTROL BOX. PERFORMED ADJUSTMENT TEST OF LANDING GEAR POSITION AND WARNING INDICATION SYSTEM IAW DC-9 MM 32-60-00-2.