Airframe and powerplant certification refers to the process by which aircraft components, specifically the airframe and engine systems, are evaluated and approved for safety and performance. This certification ensures that these critical parts meet the standards set by aviation authorities, such as the Federal Aviation Administration (FAA) in the United States. To achieve certification, manufacturers must conduct rigorous testing and provide detailed documentation demonstrating compliance with regulatory requirements. Once certified, the airframe and powerplant can be used in aircraft, ensuring they operate safely and efficiently throughout their service life.