The Maintenance Organisation Exposition (MOE)

The exposition

The maintenance organisation exposition is the document in point 145.A.70.

What the MOE includes

The lines quoted from point (a) are the accountable manager's statement, the safety policy, the persons nominated under points 145.A.30(b), (c) and (ca), their duties, the organisation chart, and the list of certifying staff and, if applicable, support staff and airworthiness review staff. Point (c) is which amendments shall be approved by the competent authority.

Why the exposition amendment form asks what it asks

Use the Avioverse Exposition amendment (no prior approval) form to record an MOE proposal and screen its approval route before implementation. The document reference, current and proposed revisions and changed chapters locate the change. The rationale and supporting evidence explain its purpose and give reviewers the relevant documentation, which 145.A.85(b) requires the organisation to provide to the authority for changes requiring prior approval. The form's title does not decide the route: its prior-approval question is the check that determines whether the proposal belongs in this process.

Screen the proposal against 145.A.85(a): changes to the certificate and terms of approval, the accountable manager and the persons referred to in 145.A.30(b), (c) and (ca), specified reporting lines, the procedure for changes not requiring prior approval, and additional locations other than those subject to 145.A.75(c). Point (b) covers those changes and any other prior-approval requirements in Part-145: apply before the change, provide the relevant documentation and implement only after formal authority approval, observing any authority-prescribed conditions during the change. Point (c) requires other changes to be managed and notified under the procedure approved by the competent authority in accordance with 145.B.310(h). The form's manager-review and compliance-review sections record the internal decision and the applicable authority action; an internal Approve response does not replace required authority approval.

Assign those written follow-up sections to the responsible process manager and compliance monitoring manager who are workspace members. Each records Approve or Request changes with a comment, or Not required with a reason. Record notification evidence for the route under point (c). If prior approval is required, record referral to the authority and request changes; do not implement the amendment before that approval. This explanation applies to the MOE branch. The CAMO guide covers the CAME branch under its own rules.

How a foreign Part-145 organisation may structure it

The rule says what the exposition includes. The EASA user guide UG.CAO.00024-010, written for foreign Part-145 approvals, describes ways to build that document. The sentences below are from that guide, revision label 2026-05-19.

Point 1.7.1 is the single document. Point 1.7.2 is an MOE supplemented by associated procedures/lists. Must contain at least is a minimum. That sentence continues.

How the exposition ties the series together

The overview sets out the terms of approval and the scope of work. The personnel guide sets out the persons nominated under points 145.A.30(b), (c) and (ca). The data and performance guide and the certification guide are the other parts of the same approval. The exposition is the description the organisation keeps up to date. The last guide, tool control and calibration, takes 145.A.40 into practice, including alternative tools and the exposition.

Where to read it yourself

145.A.70 is in Annex II (Part-145) of Regulation (EU) No 1321/2014, in the EASA Easy Access Rules for Continuing Airworthiness. That citation was checked against the 2025-09-02 revision. The structuring sentences were checked against UG.CAO.00024-010, library revision label 2026-05-19. The user guide is guidance for foreign Part-145 approvals, not a substitute for 145.A.70.