The Federal Aviation Administration (FAA) possesses broad legal authority to ensure safety in U.S. airspace, and their enforcement powers range from administrative warnings to multimillion-dollar fines. Their primary tool for pilots and mechanics is the Certificate Action, where the FAA can suspend or permanently revoke a person's license to fly or perform maintenance. For airlines and manufacturers, the FAA utilizes Civil Penalties, issuing fines that can reach tens of thousands of dollars per individual violation—which can add up to millions for systemic issues. The FAA also has "Summary Seizure" power to ground specific aircraft that are deemed unairworthy. While the FAA is a regulatory body and not a criminal prosecutor, they work closely with the Department of Justice (DOJ); if an investigation reveals criminal intent (such as falsifying records or endangering the public), the FAA refers the case to the DOJ for criminal prosecution, which can result in prison time.