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FAA-S-ACS-1 and FAA-G-ACS-1 are current in 2025.

This Federal Aviation Administration (FAA) Aviation Mechanic – General, Airframe, and Powerplant Airman Certification Standards (ACS) document provides the knowledge, risk management, and skill standards required to earn an FAA airman certificate. This ACS also includes the ACS Companion Guide (FAA-G-ACS-1) as well as FAA references for each subject.

The Airman Certification Standard is the guide for students, instructors, and evaluators to understand what applicants must know, do, and consider to pass their FAA Knowledge Exams and Oral & Practical (O&P) Test and earn their Aviation Mechanic Certificate.
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