---
title: "145.A.35(a) Certifying staff and support staff requirements — Part-145 · Avioverse"
description: "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…"
url: "https://avioverse.aero/regulations/easa/continuing-airworthiness/part-145/section-a-technical-and-organisation-requirements/145-a-35-a"
---

# 145.A.35(a) Certifying staff and support staff requirements

Annex II (Part-145) · Regulation (EU) No 1321/2014 · EAR revision 2 Sep 2025

Official sources: [EASA Easy Access Rules (opens in a new tab)](https://www.easa.europa.eu/en/document-library/easy-access-rules/easy-access-rules-continuing-airworthiness) · [EUR-Lex 2014/1321 (opens in a new tab)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014R1321)

Part of [145.A.35 Certifying staff and support staff](https://avioverse.aero/regulations/easa/continuing-airworthiness/part-145/section-a-technical-and-organisation-requirements/145-a-35#point-a)

IR Implementing rule

## 145.A.35(a) Certifying staff and support staff requirements

(a) In addition to the requirements of points 145.A.30(g) and (h), the [organisation](https://avioverse.aero/glossary/easa/organisation) shall ensure that [certifying staff](https://avioverse.aero/glossary/easa/certifying-staff) and support staff have an adequate understanding of the relevant [aircraft](https://avioverse.aero/glossary/easa/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](https://avioverse.aero/glossary/easa/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.

IR · 145.A.35(a) — Regulation (EU) No 1321/2014 · Regulation (EU) 2018/1142 · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

AMC Acceptable means of compliance

## AMC 145.A.35(a) Certifying staff and support staff

1\. Holding a Part-66 licence with the relevant type/group rating, or a national qualification in the case of components, does not mean by itself that the holder is qualified to be authorised as [certifying staff](https://avioverse.aero/glossary/easa/certifying-staff) and/or support staff. The [organisation](https://avioverse.aero/glossary/easa/organisation) is responsible for assessing the competency of the holder for the scope of the [maintenance](https://avioverse.aero/glossary/easa/maintenance) to be authorised.

2\. The sentence ’the organisation shall ensure that certifying staff and support staff have an adequate understanding of the relevant [aircraft](https://avioverse.aero/glossary/easa/aircraft) and/or components to be maintained together with the associated organisation procedures‘ means that the person has received training and has been successfully assessed on:

the type of aircraft or [component](https://avioverse.aero/glossary/easa/component);

the differences on:

the particular model/variant;

the particular configuration.

The organisation should specifically ensure that the individual competencies have been established with regard to:

relevant knowledge, skills and experience in the product type and configuration to be maintained, taking into account the differences between the generic aircraft type rating training that the person received and the specific configuration of the aircraft to be maintained.

appropriate attitude towards safety and observance of procedures.

knowledge of the associated organisation and operator procedures (i.e. handling and identification of components, MEL use, Technical Log use, independent checks, etc.).

3\. Some special maintenance tasks may require additional specific training and experience, including but not limited to:

in-depth troubleshooting;

very specific adjustment or test procedures;

rigging;

engine run-up, starting and operating the engines, checking engine performance characteristics, normal and emergency engine operation, associated safety precautions and procedures;

extensive structural/system inspection and repair;

other specialised maintenance required by the maintenance programme.

For engine run-up training, simulators and/or real aircraft should be used.

4\. The assessment of the competency of the holder should be conducted in accordance with a procedure approved by the competent authority (item 3.9 of the MOE, as described in AMC1 145.A.70(a)).

5\. The organisation should hold copies of all the documents that attest to the competency and recent experience of the holder for the period described in point 145.A.55(d)(4).

Additional information is provided in AMC 66.A.20(b)3.

AMC · AMC 145.A.35(a) — Regulation (EU) No 1321/2014 · ED Decision 2022/011/R · Continuing Airworthiness Easy Access Rules · EAR revision 2 Sep 2025

[All rules in SECTION A — TECHNICAL AND ORGANISATION REQUIREMENTS](https://avioverse.aero/regulations/easa/continuing-airworthiness/part-145/section-a-technical-and-organisation-requirements)

Consolidated from the EASA Easy Access Rules (revision 2 Sep 2025, extracted 2 Nov 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.