What was found
AT CRUISE W NR 2 ANTI-ICE ON PER MEL. RECVD NR 2 ANTI-ICE OFF ALERT WITH ENGINE NR 2 A-ICE DUCT HAS FAILED. DIVERTED. INTERROGATED ESC VIA CFDS, NO FAULT FOUND ON CURRENT FAULT BUT GOT ANTI-ICE VLV FAULT ON FAULT. REPLACED D1-90 AND D1-91 SENSING ELEMENT FOR PREVENTION IAW AMM 30-22-11-5. PERFORMED NR 2 ENG COWL MANIFOLD FAILURE SENSING ELEMENT FUNCTIONAL TEST AND TEST PASSED IAW AMM 30-22-04. REPLACED NR 2 ANTI-ICE SHUTOFF AND REGULATING VALVE AND MUSCLE SUPPLY LINE IAW AMM 30-22-06-4-1. REPLACED NR 2 ENG ANTI-ICE VALVE MUSCLE SUPPLE IN-LINE FILTER. PER AMM 30-22-00-5-2 PERFORMED NR 2 ENG ANTI-ICE VALVE OPEARTION TEST NORMAL. ENGING COWLING AND WORK PLATFORM CLOSED AND LOCKED AS PER AMM 52-46-01-2, 71-10-00-2-1.