T9074-AS-GIB-010/271 Rev 1
6.8.4.4 Continuous Scanning of Nonparallel Surfaces. Unless otherwise specified in the applicable specifications, each pass across the test surface shall overlap 25 percent of the previous pass until the entire surface has been scanned. The equipment settings established in 6.8.4.3 calibration shall be used.
6.8.5 Marking. When an indication in excess of acceptance standards occurs, the material shall be appropriately marked.
6.8.6 Flaw Plotting. Each defect shall be explored ultrasonically to determine its size. The edge of the defect shall be determined by moving the search unit toward the defect and noting the position of the leading edge of the transducer when the defect first appears. The length of the defect shall be determined by continuing to move the search unit across the defective area and noting the trailing edge of the transducer when the indication disappears. The distance between defects shall be determined by measuring the shortest distance between their edges regardless of indication amplitude at these points.
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