What was found
AT 600 FT AGL ANTI-ICE DUCT MASTER WARNING. PERFORMED QRH MESSAGE WENT AWAY. AT ABOUT 2000 FT AGL MESSAGE RETURNED. PERFORMED QRH AND THE MASTER WARNING FOR RT 14TH DUCT DISPLAYED WITH 14TH STAGE BLEEDS CLOSED. QRH R 14TH DUCT PERFORMED. LANDED A REPLACED RT MODULATING/SHUTOFF VALVE IAW AMM 30-12-04. PERFORMED OPS CHECK OF VALVE IAW AMM 30-12-00. ALL CHECKS GOOD. PERFORMED OPS CHECK OF THE BLEED-AIR LEAK DETECTION/ WARNING SYSTEM IAW AMM 36-21-00. PERFORMED HIGH POWER RUN-UP IAW AMM 71-00-00. NO DEFECTS NOTED.