What was found
CREW REPORTED IN TRI WING ANTI ICE SYS INOP, RT WING RED WITH WING A/I SELECTED OFF. MAINTENANCE REMOVED AND REPLACED THE NR 2 BLEED AIR LEAK CONTROL UNIT ALONG WITH THERMAL SWITCHES WS 51, WS 73, WS 140, 149, AND 250. NO OTHER DEFECTS WERE NOTED AND AIRCRAFT WAS RELEASED FOR SERVICE.