What does the 'C' in TSO C22 indicate concerning the technical standards requirements?

The 'C' in TSO C22 represents "Certification." TSO stands for Technical Standard Order, which is a minimum performance standard for specified materials, parts, and appliances used on aircraft. When a technical standard order indicates a specific number followed by a 'C', it showcases that the item conforms to the standards and requirements set forth by the Federal Aviation Administration (FAA) for safety and performance.

In this context, "Certification" signifies that the item meets the technical standards required for it to be used in aviation. This certification process ensures that the equipment will perform safely and effectively within its intended use, which is essential for maintaining operational safety in aircraft. The number following the 'C' indicates the specific standard that the item adheres to, which is crucial for industry professionals to ensure they use compliant and approved components in various applications.