Discussion paper on Part 66 modular licensing framework for aircraft maintenance engineers (DP 2218MS)

Closes 12 Feb 2023

Opened 16 Dec 2022


We are seeking feedback on a proposed aircraft maintenance engineer (AME) modular licensing structure to facilitate earlier and more achievable licensing outcomes.

This stems from industry feedback about the inflexibility of the Part 66 of the Civil Aviation Saftey Regulations 1998 (CASR) licensing system, particularly compared to the previous regulation 31 of the Civil Aviation Regulation 1988 (CAR) five category licence process.

We propose to use the existing Part 66 of CASR knowledge modules as the basis of the modular licensing structure. This will ensure full compatibility with the existing Part 66 of CASR licence categories and subcategories.

The proposed framework outlined in the discussion paper will assist in the development of a progressive modular licence structure that is IACO Annex 1 compliant and would provide for:

  • earlier licensing outcomes
  • more flexible modular licensing structure
  • clear and efficient pathways for progression to full Part 66 licence.

It would also:

  • set eligibility requirements proportionate to the scope and range of maintenance to be performed
  • describe certification privileges based on the associated training/experience
  • maintain maintenance safety standards.

The proposed modular licensing structure comprises:

  • subsets of B1 — based on existing Part 66 of CASR knowledge modules and associated practical requirements
  • subsets of B2 — introducing electrical, instrument and radio subsets using existing Part 66 of CASR knowledge topics and associated practical requirements.

Please read the discussion paper document DP 2218MS for more information. 

Previous consultations

We have consulted with the Part 66 Technical Working Group (TWG) on the technical details of the proposed modular structure and are now seeking broader industry input for the first time.

Following this consultation, we will continue to work with the TWG to consider feedback and develop a legislative package and explanatory material that would achieve the desired outcomes, and which will be consulted with industry in Q1 2023.. 

Why your views matter

Your feedback will help inform the next phase of policy development and implementation.

Please submit your comments using the survey link on this page.

If you are unable to provide feedback via the survey link, please email regulatoryconsultation@casa.gov.au for advice. 

Documents for review

The Related section at the bottom of this page contains all the documents for this consultation. They are:

  • Discussion paper DP 2218MS
  • MS Word copy of online consultation for ease of distribution and feedback within your organisation. 

What happens next

At the end of the response period, we will:

  • review all comments received
  • make responses publicly available on the consultation hub (unless you request your submission remain confidential)
  • publish a Summary of Consultation which summarises the feedback received and outlines any intended changes and next steps.

Feedback that improves on the options discussed will be incorporated into the policy proposed.

Post-implementation review

We will monitor and review the new policies in practice on an ongoing basis.

Give Us Your Views


  • CASA Staff
  • Part 147 of CASR Maintenance training organisations
  • Part 145 of CASR approved maintenance organisations (AMO)
  • Regulation 30 of CAR maintenance organisations (CAR 30)
  • Licensed aircraft maintenance engineers (LAME)
  • Aircraft maintenance engineers (AME)
  • Training organisation representative


  • Airworthiness / maintenance
  • Private operations
  • Airworthiness/maintenance (CAR 30 and CASR Part 145 maintenance orgs)
  • Aircraft engineer licensing
  • Maintenance training