What was found
WING ANTI-ICE FAIL CAUTION MSG IN CLIMB DURING A VERY SHORT ICING DETECTION CYCLE. DEFERRED WING ANTI-ICE IAW MEL 30-1, AUTH 070065D-C. CMC=WING 1 A/I LEAK. INSPECTED ECS1 AREA WITH PACK ON, FOUND LARGE LEAK FROM EXHAUST SHROUD COUPLER SPRAYING ON A/I LEAK DETECTED, TIGHT END CLAMP AND SECURED LEAK. A/I SYSTEM REQ OPS CHECK IAW AMM CH 30-00-00-700-802-A, GROUND PNEUMATIC CHECK, MEL REMAINS OPEN. PERFORMED OPS TEST OF WING ANTI-ICING SYSTEM IAW AMM 30-00-00-700-802-A, OPS CHECK GOOD. THIS RESTORES MEL 30-1.