Airman Certification Standards (ACS)
The FAA-S-ACS-1, Aviation Mechanic General, Airframe, and Powerplant Airman Certification Standards (mechanic ACS) is the testing standard for mechanic written, oral, and practical tests.
The mechanic ACS is divided into 3 tests/sections (General, Airframe, and Powerplant) which list the knowledge, risk management, and skill elements that a mechanic applicant must know or demonstrate during the oral and or practical test.
The general test/section is required to be taken/passed to obtain either the airframe or powerplant rating.
The testing standard contains the following number of subject areas in each test area:
- General - 12
- Airframe - 15
- Powerplant - 13
Airman Certification Standards(ACS)
The FAA's implementation of part 147 will change the testing standards for mechanic certificates and ratings. The Mechanic Practical Test Standards (Mechanic PTS) will be used until July 31, 2023. After that date, the FAA will use the Aviation Mechanic General, Airframe, and Powerplant Airman Certification Standards (Mechanic ACS) as the standards for conducting mechanic tests.
