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FAASTeam Notice
Type: General Information
Notice Date: Friday, June 17, 2022
Notice Number: NOTC2449
Human Factors Training Resources for Aviation Maintenance
This posting will be removed on
Friday, July 18, 2025

On May 24, 2022, the FAA published an interim final rule that establishes new regulations for part 147. The new regulations can be found here:

The final rule also includes some changes to part 65 regulations regarding certification of mechanics.

Specifically, on August 1, 2023, the FAA will begin testing mechanic applicants using the following standards:

One of the new subject areas in the Mechanic ACS is Human Factors.  The Human Factors subject area is not currently included in the Mechanic Practical Test Standards or in 14 CFR part 147 appendices B, C, or D.

  • Aviation Maintenance Technician Schools (AMTS) must begin including human factors content that aligns with the Mechanic ACS, into their Aviation Maintenance Technician Schools (AMTS) curriculum by September 21, 2022 (the effective date of the part 147 interim final rule).

  • All mechanic applicants may be tested on the Human Factors subject area beginning on August 1, 2023.

Aviation Maintenance Technician Schools (AMTS) and individuals preparing for mechanic certification should have the knowledge and skills outlined in the mechanic ACS prior to taking any written, oral, or practical test administered by the FAA and its designees (to include knowledge testing centers and Designated Mechanic Examiners (DME’s)). The following resources can provide a variety of information regarding human factors in aviation maintenance.

FAA Resources:

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

Note: Chapter 14 may not align with the expected knowledge, risk, and skill elements required by the Mechanic ACS until the next revision of this Handbook.   The FAA is working to revise the handbook as soon as possible.

  •, Library, Human Factors Category

Additional Human Factors resources that are available free of charge:

  • Australian ATSB An Overview of Human Factors in Aviation Maintenance

  • Australian CASA Aviation Human Factors Resources

  • Operators Manual: Human Factors in Aviation Maintenance

  • Fatigue Risk Management Publications and Articles

  • Human Factors Guide for Aviation Maintenance and Inspection

  • A Roadmap to A Just Culture: Enhancing the Safety Environment

  • Operator’s Flight Safety Handbook

  • ICAO Safety Management Manual (SMM) Doc 9859 AN/460

  • Bending the Rules: Managing Violation in the Workplace

By Patrick T.W. Hudson, Leiden University and D. Parker, R. Lawton Manchester University

  • Sidney Dekker

  • Restorative Just Culture Checklist

  • Punishing People or Learning from Failure The choice is ours

There are also numerous books available for purchase relating to human factors, most of which show up on a simple “human factors books” internet search.

For more information regarding the part 147 interim final rule, contact FAA Office of Safety Standards, Aircraft Maintenance Division at 202-267-1675, or

To provide feedback or comments on the Mechanic ACS or the FAA Mechanic General, Airframe and Powerplant Handbooks, contact the Regulatory Support Division, Airman Testing Section, at