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Preparing for mechanic ACS Written, Oral, and Practical Exams

Thanks to Dennis Pollard at for compiling this.


For the past several months I have been learning and preparing for the new ACS subjects that all part 147 AMTS should have by now included in their curriculums. The new ACS testing standards have been published listing all the subjects as well as several new subjects.


Be advised some of the ACS subjects that will be on the FAA mechanic exams are NOT in the FAA mechanic handbooks FAA-H-8083A or the revision ”B” that will be released July 2023.


Not to worry the additional data is covered in FAA-G-ACS-1, Companion Guide to the Aviation Mechanic General, Airframe, and Powerplant Airman Certification Standards. In the back of the companion guide is a list of FAA documents you should download to go with your studies and to review before you take the mechanic ACS exams. These titles, AC, and handbooks are FREE to download and I can guarantee DMEs will use these reference books for many of the new practical projects. In addition, many of the new ACS questions on the written, oral, and practical oral tests will come from these reference books.


I have provided a master list of all the reference books below. And all of these can be found on this website in the reference manual section, or you can follow the hyperlinks below.


Reference FAA-G-ACS-1, Companion Guide

FAA-S-ACS-1 Aviation Mechanic General, Airframe, and Powerplant Airman Certification Standards


This mechanics Airman Certification Standard (ACS) is based on the following 14 CFR parts, FAA publications, FAA guidance, and learning aid documents.


• 14 CFR Title 14 of the Code of Federal Regulations

• 14 CFR part 43 Maintenance, Preventive Maintenance, Rebuilding, and Alteration

• 14 CFR part 45 Identification and Registration Marking

• 14 CFR part 65 Certification: Airmen Other Than Flight Crewmembers

• 14 CFR part 91 General Operating and Flight Rules

• 14 CFR part 147 Aviation Maintenance Technician Schools


• AC 20-35 Tiedown Sense

• AC 25.1455-1 Waste Water/Potable Water Drain System Certification Testing

• AC 25-11 Electronic Flight Displays

• AC 43-9 Maintenance Records

• AC 43.13-1 Acceptable Methods, Techniques, and Practices - Aircraft Inspection & Repair

• AC 43.13-2 Acceptable Methods, Techniques, and Practices - Aircraft Alterations

• AC 43-215 Standardized Procedures for Performing Aircraft Magnetic Compass Calibration

• AC 45-2 Identification and Registration Marking

• AC 60-11 Test Aids and Materials that May be Used by Airman Knowledge Testing Applicants

• AC 60-28 FAA English Language Standard for an FAA Certificate Issued Under 14 CFR Parts 61, 63, 65, and 107

• AC 120-39 Hazards of Waste Water Ice Accumulation Separating from Aircraft in Flight

• AC 150/5210-20 Ground Vehicle Operations to include Taxiing or Towing an Aircraft on Airports


• FAA-H-8083-1 Aircraft Weight and Balance Handbook

• FAA-H-8083-2 Risk Management Handbook

• FAA-H-8083-25 Pilot’s Handbook of Aeronautical Knowledge

• FAA-H-8083-30 Aviation Maintenance Technician Handbook–General

• FAA-H-8083-31 Aviation Maintenance Technician Handbook–Airframe (Volumes 1 and 2)

• FAA-H-8083-32 Aviation Maintenance Technician–Powerplant (Volumes 1 and 2)

• POH/AFM Pilot’s Operating Handbook/FAA-Approved Airplane Flight Manual


Note: Users should reference the current edition of the reference documents listed above. The current edition of all FAA publications can be found at:

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