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Aviation Mechanic Knowledge Test Prep Guide

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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.

Oral Preparation General | Airframe | Powerplant

Oral Questions Preparation

Welcome to the Oral Testing component of the course. Please understand the Airman Certification Standard testing process:

  • The ACS is divided into three sections: General, Airframe, and Powerplant, listing knowledge, risk management, and skill elements.
  • The testing standard contains the following number of subject areas in each test area:
    General - 12
    Airframe - 15
    Powerplant - 13
  • The oral test requirements are:
    • A minimum of 4 questions in each subject area (for each test, (i.e., general, airframe, and powerplant)).
      • * Assuming 100% on the written test
    • A maximum of 22 questions (General test)
    • A maximum of 34 questions (Airframe or Powerplant test).
      • * Assuming a 70% on the written test
  • The oral test is passed when a minimum of 70% on the oral test as a whole (for each Section (General | Airframe | Powerplant)).
Course Instructions:

To maximize the benefits of this course, please adhere to the following instructions:

  • Step 1 Study the Oral Subjects: Study all subjects regardless of the knowledge test report results. It is strongly recommended to search the oral questions in the FAA Handbooks during the review.
  • Step 2 Schedule Virtual Oral Review: Schedule for an Oral Exam and attend other participants oral reviews.
  • Step 3 Review Recorded Oral and Skills (Practical): Review recorded simulated oral reviews from other students. It is important to know why the answer is correct and not just that it is the answer to the specific question.

Follow these instructions diligently to ensure you are well-prepared for the oral test component of the Aviation Mechanic Certification process.


Practical General | Airframe | Powerplant

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Practical Projects Preparation

The mechanic practical test (General, Airframe, and Powerplant) includes a random sampling of the subject areas in the testing standard. To perform well on the practical projects exam, it's important to incorporate your past experience and skills to the fullest extent. Familiarize yourself with FAA publications to accurately identify the projects listed in the exam.

The practical test consists of the following number of practical projects:

  • General – 9
  • Airframe – 11
  • Powerplant – 11

Additionally, each practical project consists of a skill demonstration and two oral practical questions, related to the project.

The practical test is passed when the applicant satisfactorily demonstrates 70% of the practical projects tested.

If you can answer the following sample questions, complete the practical projects and know how they relate to other questions, answers and projects in the the subject area, you should be ready to complete the exam.

References:

Aircraft Handbooks & Manuals

FAA Handbooks Textbooks
AMG Texbook
AMA Texbook
AMP Texbook
AC 43.13
FAA-H-8083-1B Aircraft Weight and Balance Handbook
Companion Guide to the Aviation Mechanic General, Airframe, and Powerplant Airman Certification Standards
Plane Sense General Aviation Information