What was found
DURING LANDING GEAR EXTENSION THE RED NOSE LANDING GEAR LIGHT ILLUMINATED. APPROACH ABORTED AND RECEIVED VISUAL GEAR DOWN CONFIRMATION FROM TOWER. LANDED WITHOUT INCIDENT. MAINTENANCE ACCOMPLISHED TROUBLESHOOTING IAW AMM 32-30-00. A FOREIGN OBJECT WAS FOUND BLOCKING THE NOSE LANDING GEAR SENSOR TARGET. OBJECT WAS REMOVED AND A SATISFACTORY NOSE LANDING GEAR SWING ACCOMPLISHED IAW 32-30-00. ALL CHECKS NORMAL . AIRCRAFT WAS GROUNDED.