What was found
FLT 1716 FROM TOL TO STL. DURING CLIMB OPERATION WHEN RETRACTING THE FLAP FROM 5 DEGREES TO 2 DEGREES THE NR 4 L/E FLAP AMBER LIGHT REMAINED ILLUMINATED. THE AIRCRAFT RETURNED TO TOL WHERE IT LANDED WITH OUT INCIDENT. POST FLIGHT INSPECTION WAS PERFORMED. FOUND THE NR 4 FLAP SWITCH ACTIVATION LINKAGE DAMAGED. REMOVED AND REPLACED THE NR 4 L/E FLAP POSITION SWITCH LINKAGE, OPS CHECK GOOD. AIRCRAFT WAS RETURNED TO SERVICE.