Part-145 Certifying and Support Staff
Part-145 certifying and support staff: the accountable manager, the certification authorisation from a Part-66 licence, and line and base maintenance roles.
Dionysis Kefalas7 min readFor Part-145 and CAMO staff
Part 2 of 6 in EASA Part-145 Maintenance Organisation Show parts
Quotes checked on against EASA Easy Access Rules for Continuing Airworthiness (Regulation (EU) No 1321/2014) — 2 Sep 2025 revision.
On this page
The people who sign for the work
This page is who is nominated above that signature, and the certifying staff for line maintenance and for base maintenance.
The accountable manager and nominated persons
The organisation shall appoint an accountable manager that has corporate authority to ensure
that all maintenance activities of the organisation can be financed and carried out in
accordance with Regulation (EU) 2018/1139 and its delegated and implementing acts. The
accountable manager shall:
1.ensure that all necessary resources are available to accomplish maintenance in accordance
with this Annex, Annex I (Part-M) and Annex Vb (Part-ML), as applicable, to support the
organisation certificate;
2.establish and promote the safety policy specified in point 145.A.200(a)(2);
3.demonstrate a basic understanding of this Regulation.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
The accountable manager shall nominate a person or group of persons representing the management
structure for the maintenance functions and with the responsibility to ensure that the
organisation works in accordance with the MOE and approved procedures. It shall be made clear in
the procedures who deputises for a particular person in the case of lengthy absence of that
person.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
The accountable manager shall nominate a person or group of persons with the responsibility to
manage the compliance monitoring function as part of the management system.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
The accountable manager shall nominate a person or group of persons with the responsibility to
manage the development, administration and maintenance of effective safety management processes
as part of the management system.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
The accountable manager shall nominate a person or group of persons under point 145.A.30(b), point 145.A.30(c) and point 145.A.30(ca): the maintenance functions, the compliance monitoring function, and the effective safety management processes.
Certifying staff and support staff
(a)In addition to the requirements of points 145.A.30(g) and (h), the organisation shall ensure
that certifying staff and support staff have an adequate understanding of the relevant aircraft
or components, or both, to be maintained and of the associated organisation procedures. In the
case of certifying staff, this shall be accomplished before the issue or reissue of the
certification authorisation.
1.‘Support staff’ means those staff holding an aircraft maintenance licence under Annex III
(Part-66) in category B1, B2, B2L, B3 and/or L with the appropriate aircraft ratings, working in
a base maintenance environment while not necessarily holding certification privileges.
2.‘Relevant aircraft and/or components’, means those aircraft or components specified in the
particular certification authorisation.
3.‘Certification authorisation’ means the authorisation issued to certifying staff by the
organisation and which specifies the fact that those staff may sign certificates of release to
service within the limitations stated in such authorisation on behalf of the approved
organisation.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
(b)Except for the cases listed in points 145.A.30(j) and 66.A.20(a)3(ii), the organisation may
only issue a certification authorisation to certifying staff in relation to the basic categories
or subcategories and, except for the category A licence, any type rating listed on the aircraft
maintenance licence as required by Annex III (Part-66), subject to the licence remaining valid
throughout the validity period of the authorisation and to the certifying staff remaining in
compliance with Annex III (Part-66).
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
Point 1 of 145.A.35(a) is support staff: category B1, B2, B2L, B3 and/or L, in a base maintenance environment, while not necessarily holding certification privileges. Point 3 is the certification authorisation. Point 145.A.35(b) is the basic categories or subcategories and, except for the category A licence, any type rating listed on the aircraft maintenance licence. The cases in points 145.A.30(j) and 66.A.20(a)3(ii) are excepted, and this page does not set them out. The licence itself is the Part-66 series.
Line maintenance and base maintenance
(g)Any organisation maintaining aircraft, except where stated otherwise in point (j), shall in
the case of aircraft line maintenance, have appropriate aircraft-rated certifying staff
qualified as category B1, B2, B2L, B3 and L, as appropriate, in accordance with Annex III
(Part-66) and point 145.A.35.
In addition such organisations may also use appropriately task-trained certifying staff holding
the privileges set out in points 66.A.20(a)(1) and 66.A.20(a)(3)(ii) and qualified in accordance
with Annex III (Part-66) and point 145.A.35 to carry out minor scheduled line maintenance and
simple defect rectification. The availability of such certifying staff shall not replace the
need for category B1, B2, B2L, B3 and L certifying staff, as appropriate.
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
Any organisation maintaining aircraft, except where stated otherwise in point (j), shall:
1.in the case of base maintenance of complex motor-powered aircraft, have appropriate
aircraft-type-rated certifying staff, qualified as category C in accordance with Annex III
(Part-66) and point 145.A.35. In addition, the organisation shall have sufficient
aircraft-type-rated staff qualified as category B1 and B2, as appropriate, in accordance with
Annex III (Part-66) and point 145.A.35 to support the category C certifying staff.
(i)Category B1 and B2 support staff shall ensure that all relevant tasks or inspections have
been carried out to the required standard before the category C certifying staff issues the
certificate of release to service.
(ii)The organisation shall maintain a register of any such category B1 and B2 support staff.
(iii)The category C certifying staff shall ensure that compliance with point (i) has been met
and that all work required by the customer has been accomplished during the particular base
maintenance check or work package, and shall also assess the impact of any work not carried out,
with a view to either requiring its accomplishment or agreeing with the operator to defer such
work to another specified check or time limit.
2.in the case of base maintenance of aircraft other than complex motor-powered aircraft, have
one of the following:
(i)appropriate aircraft-rated certifying staff, qualified as category B1, B2, B2L, B3 and L, as
appropriate, in accordance with Annex III (Part-66) and point 145.A.35;
(ii)appropriate aircraft-rated certifying staff, qualified in category C or L5, as applicable,
and assisted by support staff, as set out in point 145.A.35(a)(1).
Quoted word for word from Regulation (EU) No 1321/2014, Easy Access Rules for Continuing Airworthiness, 2 Sep 2025 revision.
Point 145.A.30(g) is line maintenance. The certifying staff the organisation shall have are category B1, B2, B2L, B3 and L. It may also use task-trained certifying staff for minor scheduled line maintenance and simple defect rectification.
Point 1 of 145.A.30(h) is base maintenance of complex motor-powered aircraft: category C certifying staff, and category B1 and B2 staff to support them. Point 2 is base maintenance of aircraft other than complex motor-powered aircraft.
EASA also publishes a policy on how these roles work together during a maintenance event. This page does not restate that policy.
Next
The data, tools and procedures these staff work to are covered in Maintenance Data, Components and Performing the Work. The certificate they sign is the subject of Certification of Maintenance and Records.
Where to read it yourself
The personnel rules are 145.A.30 and 145.A.35 in Annex II (Part-145) of Regulation (EU) No 1321/2014, in the EASA Easy Access Rules for Continuing Airworthiness. 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.
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Written by Dionysis Kefalas. Retired Hellenic Air Force Captain and founder of Avioverse. About the author
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