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CAMO and CAO Continuing Airworthiness Bodies

EASA Part-CAMO and Part-CAO organisations explained: the management system, the accountable manager and nominated persons, and what a CAO is.

Dionysis Kefalas5 min readFor CAMO and Part-145 staff

Part 5 of 8 in EASA Continuing Airworthiness Show parts
  1. 1Continuing Airworthiness: Part-M and Part-CAMO
  2. 2Aircraft Maintenance Programme under Part-M
  3. 3EASA Reliability Programmes and Monitoring
  4. 4Airworthiness Reviews and the ARC
  5. 5CAMO and CAO Continuing Airworthiness Bodies
  6. 6Part-M: Release to Service and Records
  7. 7EASA Airworthiness Directives: AD Compliance Explained
  8. 8LLP Back-to-Birth Records and Component Tracking (M.A.305)

Quotes checked on against EASA Easy Access Rules for Continuing Airworthiness (Regulation (EU) No 1321/2014) — 2 Sep 2025 revision.

On this page

The organisation

The approval is of an organisation. CAMO.A.200 is the management system. Who places continuing-airworthiness tasks with a CAMO or a CAO is quoted in the overview. This page does not restate those points.

The management system

CAMO.A.200 (full rule text)Management system

(a)The organisation shall establish, implement, and maintain a management system that includes:

(1)clearly defined lines of responsibility and accountability throughout the organisation, including a direct safety accountability of the accountable manager;

(2)a description of the overall philosophies and principles of the organisation with regard to safety, referred to as the safety policy;

(3)the identification of aviation safety hazards entailed by the activities of the organisation, their evaluation and the management of associated risks, including taking actions to mitigate the risks and verify their effectiveness;

(4)maintaining personnel trained and competent to perform their tasks;

(5)documentation of all management system key processes, including a process for making personnel aware of their responsibilities and the procedure for amending this documentation;

(6)a function to monitor compliance of the organisation with the relevant requirements. Compliance monitoring shall include a feedback system of findings to the accountable manager to ensure effective implementation of corrective actions as necessary;

(7)any additional requirements that are laid down in this Regulation.

(b)The management system shall correspond to the size of the organisation and the nature and complexity of its activities, taking into account the hazards and associated risks inherent in these activities.

[…]

Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.

Point (b) covers a small organisation and a large one.

The people

CAMO.A.305 (full rule text)Personnel requirements

(a)The organisation shall appoint an accountable manager, who has corporate authority for ensuring that all continuing airworthiness management activities can be financed and carried out in accordance with Regulation (EU) 2018/1139 and delegated and implementing acts adopted on the basis thereof. The accountable manager shall:

(1)ensure that all necessary resources are available to manage continuing airworthiness in accordance with this Annex, Annex I (Part-M) and Annex Vb (Part-ML), as applicable, to support the organisation approval certificate;

(2)establish and promote the safety policy specified in point CAMO.A.200;

(3)nominate a person or group of persons with the responsibility of ensuring that the organisation always complies with the applicable continuing airworthiness management, airworthiness review and permit to fly requirements of this Annex, Annex I (Part-M) and Annex Vb (Part-ML);

(4)nominate a person or group of persons with the responsibility for managing the compliance monitoring function as part of the management system;

(5)nominate a person or group of persons with the responsibility for managing the development, administration, and maintenance of effective safety management processes as part of the management system;

(6)ensure that the person or group of persons nominated in accordance with points (a)(3) to (a)(5) and (b)(2) of point CAMO.A.305 have direct access to keep him/her properly informed on compliance and safety matters;

(7)demonstrate a basic understanding of this Regulation.

[…]

(e)To be approved to carry out airworthiness reviews or recommendations in accordance with point (e) of point CAMO.A.125 and, if applicable, to issue permits to fly in accordance with point (f) of point CAMO.A.125, the organisation shall have airworthiness review staff qualified and authorised in accordance with point CAMO.A.310.

[…]

Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.

The nominations in (a)(3), (a)(4) and (a)(5) are in the quote. Airworthiness reviews are the review guide. This page does not restate the review rules.

Where a CAO fits

CAO.A.010 (full rule text)Scope

This Annex establishes the requirements to be met by a combined airworthiness organisation (CAO) in order to be issued, upon application, an approval for the maintenance and continuing airworthiness management of aircraft and components for installation thereon, and to continue carrying out those activities, where such aircraft are not classified as complex motor-powered aircraft and are not listed in the air operator certificate of an air carrier licensed in accordance with Regulation (EC) No 1008/2008.

Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.

The where clause is the aircraft limit. Outside it, this annex is not the approval. The overview quotes where the tasks then sit.

The exposition

CAMO.A.300 (full rule text)Continuing airworthiness management exposition (CAME)

[…]

(a)The organisation shall provide the competent authority with a CAME and, where applicable, any referenced associated manuals and procedures, containing all of the following information:

[…]

(b)The initial issue of the CAME shall be approved by the competent authority. It shall be amended as necessary to remain an up-to-date description of the organisation.

(c)Amendments to the CAME shall be managed as defined in the procedures referred to in points (a)(11)(iv) and (a)(11)(v). Any amendments not included in the scope of the procedure referred to in point (a)(11)(iv), as well as amendments related to the changes listed in point CAMO.A.130(a), shall be approved by the competent authority.

Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.

CAO.A.025 (full rule text)Combined airworthiness exposition

[…]

(a)The CAO shall provide a manual containing at least the following information:

[…]

(b)The initial CAE shall be approved by the competent authority.

(c)Amendments to the CAE shall be handled in accordance with point CAO.A.105.

Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.

The approval sentences are (b) and (c) in the CAME quote, and (b) and (c) in the CAE quote. How an AMP is approved is quoted in the maintenance-programme guide. This page does not restate that rule.

Where to read it yourself

Part-CAMO is Annex Vc and Part-CAO is Annex Vd of Regulation (EU) No 1321/2014, consolidated in the EASA Easy Access Rules for Continuing Airworthiness, free to download. Every citation in this guide was checked against the 2025-09-02 revision.

Educational content, not regulatory compliance advice. Verify against the current regulation text before relying on it.