To see how we are doing this, submit an RFQ today. At Aviation Parts Circuit, our goal is not just to improve the parts procurement process, but to revolutionize it. We are also an AS9120B, ISO 9001:2015, and FAA AC 00-56B accredited business, as well as the only independent distributor with a strict no China sourcing pledge, ensuring each part we sell comes with a full trace or is directly from its manufacturer. In this inventory, we have parts from all ATA 100 chapters. Peruse the 100 ATA chapters and find all the corresponding parts that we carry of those ATA numbers, quickly and effortlessly. We provide our customers with an extensive ATA Chapters list. Aviation Parts Circuit is home to a vast and diverse inventory of more than two billion new and obsolete parts for the aerospace, defense, civil aviation, electronics and IT hardware markets. Like most standardization systems within the aerospace industry, the ATA 100 Chapters is used to provide a clear, common understanding for pilots, maintenance technicians, and engineers. The first tells Excel how to display a positive number, the second tells Excel how to display a negative number. The ATA 100 is a numbering system used to document parts, components, or entire commercial aircraft. In the Format Data Labels panel to the right, expand the Number category and enter the following code pattern into the Format Code field and click the Add button.