What was found
ANTI-ICE DUCT MASTER WARNING MSG ENROUTE. FOLLOWED QRH. (FLIGHT 4709) ON ARRIVAL PERFORMED OPS CHK OF WING ANTI-ICE REF AMM 30-12-00. OPS CHKD GOOD. COULD NOT DUPLICATE FAULT ON GRND. TROUBLESHOT ANTI-ICE DUCT WARNING MSG REF FIM 36-20-00, FOLLOWING SECTION WITH FUSELAGE SYNOPTIC SHOWN IN RED DUE TO HISTORY. FOLLOWING STEP C (7) INSPD FUSELAGE DUCTS FOR HOLES, CRACKS, OR LOOSE COUPLINGS, & JOINTS. NO DEFECTS. INSPD FUSELAGE SENSING ELEMENTS A38WK, A40WK, A42WK, A46WK & PARTIALLY INSPD A18WK FOR CORRECT DISTANCE FROM THE DUCTS, THE STRUCTURE & ANY METALLIC COMPONENTS. FOUND A38WK SENSING ELEMENT PRESSED INTO DUCT JUST FWD OF CARGO BULKHEAD NEXT TO CONNECTION POINT P52WK. ADJUSTED SPACING OF SENSING ELEMENT A38WK FROM DUCT. AFTER T/S, OPS CHK OF WING ANTI-ICE REF AMM 30-12-00. OPS CHKD GOOD.