What was found
DURING APPROACH UPON LANDING GEAR EXTENSION, NOSE GEAR UNSAFE INDICATION REMAINED ILLUMINATED. RECYCLED LANDING GEAR TO NO AVAIL. PRIOR TO PERFORMING ALTERNATE EXTENSION, NOSE GEAR SAFE INDICATION ILLUMINATED. VERIFIED INDICATION THROUGH VIEWING PORT AND LANDING GEAR AURAL WARNING HORN. MAINTENANCE REPLACED NOSE GEAR UP AND DOWN INDICATION SWITCHES. GEAR SWING CHECK NORMAL.