What was found
(CAN) DURING A ROUTINE MAINTENANCE CHECK, TASK 7610/05 (UNRELATED TO THE ISSUE) A DE-ICE LINE WAS FOUND TO BE CORRODED UNDER THE CUSHIONED CLAMPS. THE CUSHION CLAMPS WERE WEATHERED AND HARDENED. THE DE-ICE LINE (PN 83010019-21) RUNS BETWEEN THE FUSELAGE AND THE LH NACELLE ON THE FRONT SPAR. THE CORROSION WAS FOUND UNDER ALL 5 OF THE CUSHION CLAMPS. NO OTHER EVIDENCE OF CORROSION WAS SEEN IN THE AREA. THE DE-ICE LINE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.