Describe the process of conducting a detailed inspection of welds on a newly installed antenna mount, using both visual and NDT methods.

A detailed inspection of welds on a newly installed antenna mount involves both visual inspection and non-destructive testing (NDT) methods to ensure weld quality and structural integrity. The visual inspection is the first step and involves a thorough examination of the weld surfaces for any visible defects such as cracks, porosity (small holes), undercut (grooves at the weld edges), incomplete fusion (lack of bonding between the weld and the base metal), and surface irregularities. The welds should also be checked for proper size, shape, and profile according to the engineering drawings. The visual inspection is typically performed using magnification aids, such as a magnifying glass or a borescope, to enhance defect detection. After the visual inspection, NDT methods are employed to detect subsurface defects that cannot be seen with the naked eye. Common NDT methods used for weld inspection include dye penetrant testing (DPT), magnetic particle testing (MPT), and ultrasonic testing (UT). DPT is used to detect surface-breaking cracks and porosity. MPT is used to detect surface and near-surface defects in ferromagnetic materials like steel. UT uses sound waves to detect internal defects and measure weld thickness. The choice of NDT method depends on the material being welded, the type of defects being sought, and the accessibility of the weld. All inspection results should be documented in a detailed report that includes photographs, sketches, and a description of any defects found. Any welds that fail to meet the acceptance criteria should be repaired or replaced and re-inspected.