What was found
ON APPROACH, NOSE GEAR FAILED TO LOCK DOWN ( RED LIGHT ILLUMINATED). RECYCLED GEAR TWICE, EACH ATTEMPT RED UNLOCKED LIGHT ILLUMINATED. UNABLE TO VISUALLY VERIFY GEAR DOWN/LOCKED. SELECTED FLAPS 30, GOT GEAR WARNING HORN. RETRACTED GEAR AND EXTENDED WITH A HIGHER AIRSPEED. ALL GREEN GEAR LIGHTS. CLEANED AND INSPECTED NOSE GEAR, CLEANED SWITCHES. PERFORMED GEAR SWING AND OPS CHECKED GOOD PER MM 52-35-0.