Identifying the issues - Part 145 continuing airworthiness - approved maintenance organisations

Closed 16 Feb 2018

Opened 18 Dec 2017


CASA is carrying out a comprehensive post-implementation review of Part 145 of the Civil Aviation Safety Regulations 1998 (CASR) and associated legislation. As a first step, we would like to hear about the issues you want addressed and your ideas for possible solutions.

Part 145 was first introduced in June 2011 as part of the regulatory program to transition the requirements of aircraft or aeronautical product maintenance certificates of approval from the Civil Aviation Regulations 1988 (CAR) to CASRs.

CASA believes that some elements of the legislation could be simplified, and some requirements could be less restrictive, whilst still maintaining full compliance with the International Civil Aviation Organization (ICAO), international technical arrangements, and harmonisation with other national aviation authorities (such as the European Aviation Safety Agency).

The post implementation review of Part 145 provides the opportunity to ensure the legislation effectively addresses the relevant safety risks as well as identifying and addressing any errors, omissions, gaps, unintended consequences or implementation issues.

The review will also include relevant aspects of regulations associated with Part 145, such as CASR Part 42 (e.g. certification requirements) and definitions in the CASR 1998 dictionary.

Why We Are Consulting

CASA is aware of a number of CASR and Manual of Standards requirements which need to be addressed as a priority. Issues identified so far relate to at least one of the following three themes:

  • specialist maintenance
  • complexity
  • international harmonisation.

Responses to this consultation will help to inform the development of interim measures to provide temporary relief from known issues (such as specialist maintenance complexities) until longer term changes are implemented. 

The Part 145 Post Implementation Review

The Part 145 post implementation review will evaluate Part 145 of CASR, the Part 145 MOS and applicable CASR, including the respective acceptable means of compliance, advisory and associated guidance material.

The objectives are to:

  • ensure that the legislation effectively addresses the relevant safety risks
  • maintain compliance with ICAO standards
  • improve international harmonisation
  • reduce the complexity of the legislation
  • improve the harmonisation between related CASR legislation
  • improve, where applicable, scalability of the requirements 
  • fix any anomalies in the legislation and address unintended consequences
  • remove ambiguities and generally streamline the legislation
  • resolve policy and functionality requirements for specialist maintenance
  • identify and provide interim measures to alleviate some of the complexities and burdensome requirements until changes are implemented. 

Visit the CASA website to access the related regulations, Manual of Standards, and Acceptable Means of Compliance Guidance Material including:

  • CASR Part 145 (Volume 4 of the CASR 1998)
  • Part 145 Manual of Standards
  • CASR Part 42 (Volume 1 of the CASR 1998)
  • Acceptable Means of Compliance and Guidance Material for Parts 42 and 145
  • Dictionary (Volume 5 of the CASR 1998) 


  • Airworthiness organisations
  • Engineers


  • Airworthiness / maintenance
  • Licensing