Sector regulations

Part 42 of the Civil Aviation Safety Regulations (CASR) contains the requirements for continuing airworthiness management and maintenance of aircraft.

The rule sets out the:

  • that the registered operator is responsible for the continuing airworthiness of an aircraft
  • requirements for managing continuing airworthiness
  • requirements for a continuing airworthiness management organisation (CAMO)
  • permissions for maintaining aircraft and aeronautical products
  • requirements for issuing a certificate of release to service (CRS) for aircraft and aeronautical product maintenance
  • requirements for using aeronautical products
  • requirements for reporting major defects on aircraft and aeronautical products
  • requirements for aircraft maintenance and reliability programs
  • the airworthiness review process and its requirements.

Part 145 of the Civil Aviation Safety Regulations (CASR) sets out requirements for:

  • approved maintenance organisations (AMO) and maintenance staff who need authorisation to certify maintenance
  • issuing a certificate of release to service (CRS) for aircraft and aeronautical product maintenance.
Published date: 24 April 2026
Online version available at: https://www.casa.gov.au//operations-safety-and-travel/safety-management-systems/sector-safety-risk-profiles/maintenance-activities-sector-safety-risk-profile/sector-regulations
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