Part 42 Manual of Standards (as amended)made under regulation 42.020 of the Civil Aviation Safety Regulations 1998.This compilation was prepared on 9 October 2026 taking into account amendments up to the Part 42 Manual of Standards Amendment Instrument 2026. It is a compilation of the Part 42 Manual of Standards, as amended and in force on 9 October 2026.Prepared by the Advisory Section, Legal Services Branch, Legal Division, Civil Aviation Safety Authority, Canberra.Compilation No. 5.Contents
1.1 Introduction1.1.1 Paragraphs 42.020 (2) (n) and 42.020 (4) (b) of the Civil Aviation Safety Regulations 1998 (CASR 1998) provide that the Part 42 MOS may specify requirements for a continuing airworthiness management organisation (CAMO).1.1.2 This Chapter sets out certain requirements to be met by a CAMO for the issue and continuation of an approval to provide continuing airworthiness management services for aircraft.1.1.3 This Chapter also sets out requirements in relation to writing of procedures, by a CAMO, for carrying out maintenance.1.1.4 In this Chapter, the mention of a “Commission Regulation” in the heading of a section is a cross-reference to a similar provision in Part M of the European Commission Regulation on the continuing airworthiness of aircraft and aeronautical products, parts and appliances, and on the approval of organisations and personnel involved in these tasks. It is for information only.1.2 Continuing airworthiness management exposition [Commission Regulation M.A.704]1.2.1 The CAMO must have an exposition that contains at least the following information:(a) a statement signed by the accountable manager to confirm that the CAMO will provide continuing airworthiness management services in accordance with Part 42 of CASR 1998, this MOS and its exposition at all times;(b) detailed scope of the continuing airworthiness management services the CAMO is approved to provide;(c) the names of the individuals occupying the following positions:(i) accountable manager;(ii) continuing airworthiness manager, including any substitute continuing airworthiness manager;(iii) each responsible manager;(iv) quality manager;(d) a chart showing the CAMO’s structure and associated chains of responsibility of individuals within the CAMO;(e) a description of the CAMO’s facilities and equipment at each location as required under section 1.3;(f) a list of airworthiness review employees as required under section 1.9;(g) a list of maintenance program approval employees as required under section 1.10;(h) procedures for making changes to the exposition;(i) procedures that specify how the CAMO ensures compliance with Part 42 of CASR 1998 and any requirement in this MOS.1.3 Facility and equipment [Commission Regulation M.A.706]1.3.1 The CAMO must have appropriately equipped facilities for providing the continuing airworthiness management services it is approved to provide, including:(a) office accommodation for all employees providing continuing airworthiness management services; and(b) facilities for the completion and retention of records and documents in accordance with the requirements of Part 42 of CASR 1998 and this MOS.1.3.2 The office accommodation must be of a standard that will ensure employees can perform their duties without undue distraction or discomfort.1.4 Accountable manager [Commission Regulation M.A.706]1.4.1 The CAMO must appoint an individual as the accountable manager who is ultimately responsible for ensuring:(a) that the CAMO complies with CASR 1998, this MOS, its approval and its exposition; and(b) that the CAMO has adequate resources to provide continuing airworthiness management services in accordance with its exposition.1.4.2 If the CAMO is an air transport air operator’s certificate (AOC) holder, the accountable manager for the CAMO must be an individual who has the corporate authority for managing and financing the operation under the AOC.1.4.3 If the CAMO is not an air transport AOC holder, the accountable manager must be an individual who has the corporate authority for managing and financing the CAMO.1.5 Responsible manager [Commission Regulation M.A.706]1.5.1 The CAMO must appoint at least 1 individual as the responsible manager, responsible for ensuring that the CAMO complies with CASR 1998, this MOS and the CAMO’s exposition.Note The CAMO may appoint more than 1 individual as the responsible manager. However, each appointee is responsible for ensuring that the CAMO complies with CASR 1998, this MOS and the CAMO’s exposition.1.5.2 Each responsible manager must be responsible for ensuring that the CAMO complies with CASR 1998, this MOS and the CAMO’s exposition in relation to matters for which he or she is responsible.1.5.3 Subject to subsection 1.5.4, each responsible manager must be responsible to the accountable manager unless he or she is also the accountable manager.1.5.4 If the CAMO is an air transport AOC holder, each responsible manager whose responsibility includes ensuring the CAMO’s compliance with CASR 1998, this MOS and the CAMO’s exposition in relation to providing continuing airworthiness management services for an aircraft authorised to operate under the AOC, must be responsible to the continuing airworthiness manager unless he or she is the continuing airworthiness manager.1.5.5 A responsible manager must have:(a) at least 5 years experience in matters for which he or she is responsible; or(b) at least 2 years experience in matters for which he or she is responsible provided he or she has at least an additional 3 years experience in civil aircraft maintenance.1.5.6 A responsible manager must have a comprehensive knowledge of:(a) the regulations and standards; and(b) the CAMO’s exposition;relating to matters for which he or she is responsible.1.5.7 A responsible manager, whose responsibility includes ensuring the CAMO’s compliance with CASR 1998, this MOS and the CAMO’s exposition in relation to providing continuing airworthiness management services for an aircraft, must have knowledge of the following:(a) the aircraft’s certification basis;(b) the aircraft’s structure and systems, including the propulsion system, to a level that is at least equivalent to Level 1 as set out in Appendix III of the Part 66 MOS;(c) if applicable, the aircraft’s minimum equipment list (MEL) and configuration deviation list (CDL);(d) if applicable, the relevant parts of the AOC holder’s operations manual that have continuing airworthiness implications for the aircraft.1.5.8 The CAMO must:(a) have copies of all documents that demonstrate that each responsible manager has the appropriate qualifications, experience and knowledge required under this section; and(b) keep the copies for at least 2 years after the responsible manager ceases to be a responsible manager.1.6 Continuing airworthiness manager [Commission Regulation M.A.706]1.6.1 If a CAMO is an air transport AOC holder, the CAMO must appoint an individual as the continuing airworthiness manager who is responsible for ensuring that the CAMO complies with CASR 1998, this MOS and the CAMO’s exposition in relation to providing continuing airworthiness management services for the aircraft authorised to operate under the AOC.1.6.2 The continuing airworthiness manager must report directly to the accountable manager of the CAMO unless he or she is also the accountable manager.1.6.3 Subject to subsection 1.6.6, the continuing airworthiness manager must:(a) hold, or have held, an aircraft engineer licence in category B1, B2 or C; or(b) hold, or have held, a licence that is equivalent to a licence in category B1, B2 or C; or(c) have a qualification in aircraft maintenance at least at Certificate IV level; or(d) have a qualification in aviation maintenance management at least at diploma level; or(e) have an engineering qualification at least at diploma level in any of the following disciplines:(i) aeronautical;(ii) avionics;(iii) mechanical;(iv) electrical;(v) electronics.1.6.4 The continuing airworthiness manager must have at least 3 years experience in continuing airworthiness management of aircraft.1.6.5 The continuing airworthiness manager must have the following:(a) a comprehensive knowledge of the regulations and standards applicable to airworthiness of aircraft authorised to operate under the AOC;(b) knowledge of the CAMO’s exposition;(c) if applicable, knowledge of the relevant parts of the AOC holder’s operations manual that have continuing airworthiness implications for aircraft authorised to operate under the AOC;(d) knowledge of the CAMO’s quality system.1.6.6 Despite the requirements of subsection 1.6.3, an individual who is the maintenance controller for an operator is eligible to be appointed as the continuing airworthiness manager of the CAMO at the time the operator is approved as a CAMO.Note To be appointed as the continuing airworthiness manager of the CAMO, the person must comply with the other applicable provisions of section 1.6.1.6.7 The CAMO may nominate an individual to be a substitute continuing airworthiness manager who may perform the role of the continuing airworthiness manager in his or her temporary absence.1.6.8 The substitute continuing airworthiness manager must meet the requirements of this section in relation to qualifications, experience and knowledge of a continuing airworthiness manager.1.6.9 The continuing airworthiness manager and the substitute continuing airworthiness manager must not be a responsible manager for a maintenance organisation that provides maintenance services for the aircraft that are authorised to operate under the air transport AOC.1.6.10 The CAMO must:(a) have copies of all documents that demonstrate that the continuing airworthiness manager and the substitute continuing airworthiness manager each have the appropriate qualifications, experience and knowledge required under this section; and(b) keep the copies for at least 2 years after each person ceases to be the continuing airworthiness manager or the substitute continuing airworthiness manager, as the case may be.1.7 Quality manager [Commission Regulation M.A.712]1.7.1 A CAMO that is required to have a quality system under section 1.13 must nominate a quality manager with responsibility for implementing and managing the quality system.1.7.2 The quality manager must report directly to the accountable manager in relation to his or her responsibilities under this MOS.1.7.3 The quality manager must not be the continuing airworthiness manager or a responsible manager of the CAMO.1.7.4 The quality manager must have:(a) comprehensive knowledge of the CAMO’s exposition; and(b) knowledge of the regulations and standards applicable to continuing airworthiness of aircraft; and(c) successfully completed a course in quality management which is at least equivalent to the type of course required for a person to gain certification as a lead auditor; and(d) at least 2 years experience in quality management.1.7.5 The CAMO must:(a) have copies of all documents that demonstrate that the quality manager has the appropriate qualifications, experience and knowledge required under this section; and(b) keep the copies for at least 2 years after the quality manager ceases to be the quality manager.1.8 Continuing airworthiness management employees [Commission Regulation M.A.706]1.8.1 The CAMO must have a sufficient number of appropriately qualified employees to provide the continuing airworthiness management services it is approved to provide including:(a) airworthiness review employees required under section 1.9; and(b) maintenance program approval employees required under section 1.10.1.8.2 The CAMO must:(a) have written records of the qualifications of each employee involved in providing continuing airworthiness management services; and(b) keep the copies for at least 2 years after the employee ceases to be involved in providing continuing airworthiness management services.1.9 Airworthiness review employee [Commission Regulation M.A.707]1.9.1 A CAMO that provides continuing airworthiness management services for large aircraft or aircraft operated under an AOC must have airworthiness review employees to carry out airworthiness reviews and issue airworthiness review certificates in accordance with Subpart 42.I of CASR 1998.1.9.2 The airworthiness review employee must be authorised by the CAMO, in writing, to carry out an airworthiness review and to issue an airworthiness review certificate on behalf of the CAMO.1.9.3 The authorisation must include the following information:(a) name of the employee;(b) an authorisation reference number;(c) the date the authorisation is given;(d) the type and model of aircraft for which the authorisation is given;(e) the scope and limitations of the authorisation;(f) the duration (if applicable) of the authorisation.1.9.4 The airworthiness review employee must:(a) have at least 5 years experience in continuing airworthiness management activities; or(b) have at least 2 years experience in continuing airworthiness management activities, provided he or she holds or has held:(i) a maintenance certification licence in category B1, B2 or C; or(ii) a licence that is equivalent to a licence in category B1, B2 or C.1.9.5 An airworthiness review employee must have a comprehensive knowledge of regulations and standards applicable to the airworthiness of the aircraft for which the employee is authorised.1.9.6 An airworthiness review employee must have knowledge of the following for the aircraft for which the employee is authorised:(a) the aircraft’s certification basis;(b) the aircraft’s structure and systems, including the propulsion system, to a level that is at least equivalent to Level 1 as set out in Appendix III of the Part 66 MOS.1.9.7 The CAMO must keep a list of airworthiness review employees which contains the information mentioned in subsection 1.9.3.1.9.8 The CAMO must:(a) have copies of all documents that demonstrate that each airworthiness review employee has the appropriate qualifications, experience and knowledge required under this section; and(b) keep the copies for at least 2 years after the airworthiness review employee ceases to be an airworthiness review employee.1.9.9 The CAMO must keep a copy of the authorisation for 2 years after the authorisation ceases to be in force.1.10 Maintenance program approval employee1.10.1 The CAMO that has privilege under Subpart 42.G of CASR 1998 to approve aircraft maintenance programs, or variations to an approved maintenance program, must have maintenance program approval employees to approve a maintenance program or variations to an approved maintenance program in accordance with Subpart 42.J of CASR 1998.1.10.2 The maintenance program approval employees must be authorised by the CAMO, in writing, to approve a maintenance program and variations to a maintenance program on behalf of the CAMO.1.10.3 The authorisation must include the following information:(a) name of the employee;(b) an authorisation reference number;(c) the date the authorisation is given;(d) the type and model of aircraft for which the authorisation is given;(e) the scope and the limitations of the authorisation;(f) the duration (if applicable) of the authorisation.1.10.4 The maintenance program approval employee must:(a) hold, or have held, an aircraft engineer licence in category B1, B2 or C; or(b) hold, or have held, a licence that is equivalent to a licence in category B1, B2 or C; or(c) have a qualification in aircraft maintenance at least at Certificate IV level; or(d) have a qualification in aviation maintenance management at least at diploma level; or(e) have an engineering qualification at least at diploma level in any of the following disciplines:(i) aeronautical;(ii) avionics;(iii) mechanical;(iv) electrical;(v) electronics.1.10.5 The maintenance program approval employee must have at least 3 years experience in the development and management of a maintenance program for aircraft that are the same, or of a similar type, as the aircraft for which the employee is authorised.1.10.6 The maintenance program approval employee must have a comprehensive knowledge of the following:(a) the regulations and standards applicable to the maintenance program for the aircraft for which the employee is authorised;(b) maintenance requirements related to operational approvals, if applicable;(c) the regulations and standards applicable to aircraft reliability programs, if applicable;(d) regular maintenance requirements included in the instruction for continuing airworthiness for the aircraft for which the employee is authorised.1.10.7 The maintenance program approval employee must have knowledge of the specifications and standards that have been used by the type certificate holder to develop regular maintenance requirements for the aircraft for which the employee is authorised.1.10.8 The maintenance program approval employee must have knowledge of the following for the aircraft for which the employee is authorised:(a) the aircraft’s certification basis;(b) the aircraft’s structure and systems, including the propulsion system, to a level that is at least equivalent to Level 1 as set out in Appendix III of the Part 66 MOS.1.10.9 The CAMO must keep a list of maintenance program employees which contains the information mentioned in subsection 1.10.3.1.10.10 The CAMO must:(a) have copies of all documents that demonstrate that each maintenance program employee has the appropriate qualifications, experience and knowledge required under this section; and(b) keep the copies for at least 2 years after the maintenance program employee ceases to be a maintenance program employee.1.10.11 The CAMO must keep a copy of the authorisation for 2 years after the authorisation ceases to be in force.1.11 Instructions for continuing airworthiness [Commission Regulation M.A.709]1.11.1 The CAMO must have current instructions for continuing airworthiness for the aircraft for which the CAMO is approved to provide continuing airworthiness management services.1.11.2 The CAMO must ensure that an employee providing continuing airworthiness management services for an aircraft has access to instructions for continuing airworthiness that relate to the employee’s duties.1.12 Maintenance data1.12.1 The CAMO may approve new procedures, or changes to existing procedures, for carrying out particular maintenance on an aircraft or an aeronautical product, if:(a) the maintenance is included, or is to be included, in the maintenance program for an aircraft for which the CAMO provides continuing airworthiness management services; and(b) there is no existing maintenance data that includes the procedure for carrying out the maintenance, or the procedure in the existing maintenance data is inadequate or inappropriate for the maintenance; and(c) the CAMO’s approval permits it to approve the maintenance program, or a variation to the maintenance program, for the aircraft or product; and(d) the new procedures, or changes to existing procedure do not make any damage or wear limits, or any inspection or test parameters, less restrictive than those included in the existing maintenance data for the aircraft or the aeronautical product, unless the relevant existing maintenance data was originally created by the CAMO.1.12.2 The maintenance procedure must be approved as part of the maintenance program, or changes to the maintenance program, for the aircraft in accordance with Subpart 42.J of CASR 1998.1.12.3 The CAMO must ensure that the maintenance program employee, who approves the maintenance program, has assessed the procedure to ensure that it provides for safe maintenance practice, airworthy aircraft and serviceable aeronautical product.1.12.4 The CAMO must ensure the new or changed procedure is:(a) clearly identified as maintenance data created, or changed, by the CAMO; and(b) traceable to the approval under which the data is created or changed.1.13 Quality system [Commission Regulation M.A.712]1.13.1 A CAMO that provides continuing airworthiness management services for large aircraft and aircraft operated under an AOC must have a written quality system that requires:(a) carrying out of independent audits to monitor:(i) the CAMO’s compliance with Part 42 of CASR 1998, this MOS and its exposition; and(ii) the adequacy of the CAMO’s procedures in providing continuing airworthiness management services in accordance with Part 42 of CASR 1998 and this MOS; and(iii) the standard of maintenance being carried out on the aircraft meets the requirements of Part 42 and Part 145 of CASR 1998; and(b) the recording of all audit findings; and(c) the reporting of the audit findings to the accountable manager and the responsible manager; and(d) the implementation of corrective and preventative actions for any deficiencies identified in the audit findings; and(e) the provision of feedback to the quality manager about the corrective and preventative action implemented.1.13.2 The audit must be carried out in accordance with a documented plan which ensures all items to be audited under subsection 1.13.1 are audited once every 12 months.1.13.3 The audits must be carried out by individuals who are independent of the items being audited and who:(a) have comprehensive knowledge of the CAMO’s exposition; and(aa) have knowledge of the regulations and standards applicable to continuing airworthiness of aircraft; and(b) have successfully completed a course in quality audit which is at least equivalent to the type of course required for a person to gain certification as a quality auditor.1.13.4 A CAMO must ensure any corrective and preventative action, in relation to deficiencies identified in the audit findings, is implemented in a timely manner.1.13.5 A CAMO must keep records containing the following information in relation to the audit:(a) the scope and contents of the audit;(b) when the audit was carried out;(c) the identity of each individual performing the audit;(d) the findings of the audit;(e) details of preventive and corrective actions implemented for any deficiencies identified in the findings of the audit.1.13.6 The records mentioned in subsection 1.13.5 must be kept for at least 2 years from the date the audit was conducted.1.14 Internal review [Commission Regulation M.A.712]1.14.1 A CAMO that provides continuing airworthiness management services for aircraft, other than large aircraft and aircraft operated under an AOC, must:(a) have a quality system in accordance with section 1.13; or(b) carry out internal reviews in accordance with this section to ensure the CAMO’s compliance with its exposition, Part 42 of CASR 1998 and this MOS.1.14.2 The reviews must be carried out in accordance with a documented plan which ensures all items to be reviewed under this section are reviewed once every 12 months.1.14.3 Each review must be carried out by individuals who:(a) have comprehensive knowledge of the CAMO’s exposition, Part 42 of CASR 1998 and this MOS; and(b) have:(i) successfully completed a course in quality audit which is at least equivalent to the type of course required for a person to gain certification as a quality auditor; or(ii) 3 years’ experience in performing internal review of a CAMO.1.14.4 The findings of the review must be recorded and reported to the accountable manager and the responsible manager.1.14.5 A CAMO must ensure any corrective and preventative actions, in relation to deficiencies identified in the review, are implemented in a timely manner.1.14.6 A CAMO must keep records containing the following information in relation to the review:(a) the scope and contents of the review;(b) when the review was conducted;(c) the identity of the individual(s) performing the review;(d) the findings of the review;(e) details of preventive and corrective actions implemented for any deficiencies identified in the findings of the review.1.14.7 The records mentioned in subsection 1.14.6 must be kept for 2 years from the date the review was carried out.1.15 Records [Commission Regulation M.A.714]1.15.1 A CAMO must ensure records kept under this MOS are kept:(a) in a system that allows the record to be retrieved; and(b) in a manner that ensures records are protected from damage, unintended alteration and loss.Chapter 2
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