Which of the following is an example of approved data?

Technical Standard Orders (TSOs) are regulatory documents issued by the Federal Aviation Administration (FAA) that establish minimum performance standards for specified materials, parts, and appliances used on civil aircraft. TSOs serve as the benchmark for approval and certification of aviation products and ensure that they meet safety and operational standards set forth by authorities.

This distinction makes TSOs an explicit example of approved data, as they undergo rigorous evaluation and are officially recognized as compliant with federal regulations. In contrast, while flight logs, pilot preferences documentation, and training manuals may support flight operations and training, they do not have the same formal approval status and are not inherently standardizations in the industry. Thus, only TSOs represent an accepted standard of approved data in aviation.