What was found
DURING APPROACH, ON SHORT FINAL, NOSE GEAR LIGHT CHANGED FROM GREEN TO RED, GOT HORN. CYCLED GEAR TWICE TO NO AVAIL. VISUAL INSPECTION THROUGH PORT INDICATED DOWN AND LOCKED. LANDING AND TAXI IN UNEVENTFUL. CLEANED AND RESEATED DOWNLOCK SWITCH AND (DOWNLOCK) SWITCH CONNECTOR. ALL GROUND OPS CHECK GOOD. AIRCRAFT RETURNED TO SERVICE. (K)