What was found
DUCT LEAKAGE RIGHT ENGINE AFTER TAKEOFF LAX. RETURNED TO LAX. LIGHT WENT OUT ON FINAL APPROACH, DUCT LEAK LIGHT CAME ON AGAIN. SHUT RIGHT ENGINE DOWN AFTER LANDING AND TAXIED TO GATE. INSTALLED SERVICEABLE DE-ICE VALVE. FOUND SPLIT ON FLEXIBLE LINE AT DE-CE VALVE. PERFORMED TEMPORARY REPAIR ON EXISTING LINE, OPS CHECKS GOOD.