What was found
ENGINE 2 ANTI-ICE DUCT FAIL, PASSING FL 200 TURNED ON ENGINE ANTI-ICE, RECEIVED NR 2 ENGINE DUCT FAILURE NR 2 ANTI-ICE DISAGREE. QRH INDICATED FAILURE OF NR 2 A/I DUCT. RETURNED TO PAN C WHERE ICING DID NOT EXIST. R & R ALL 3, NR 2 ENGINE COWL ANTI-ICE MANIFOLD FAIL SENSING ELEMENTS REF AMM 30-22-11-4. PERFORMED SATISFACTORY FUNCTIONAL TEST REF AMM 30-22-11-5. PARTS REMOVED ARE ELEMENT, PN 35512-61, AND 2 EA SAFETY SYS, PN 35519-4-310, SN AAC0961 & AAC0955, PARTS INFO PROVIDED REF GMM 12-7-600. OK FOR SERVICE.