IRImplementing rule
21.A.308Eligibility of a component for installation in a control and monitoring unit (CMU)
(a)A CMU component that is critical for the intended UAS operation, as determined by the design approval holder and agreed with the Agency, is eligible for installation in a CMU provided it is in a condition for safe operation, is marked in accordance with Subpart Q, and is accompanied by an authorised release certificate (EASA Form 1).
(b)A CMU component which is not deemed critical for the intended UAS operation, as determined by the design approval holder and agreed with the Agency, is eligible for installation in a CMU provided that:
(1)the CMU component is in a condition for safe operation; and
(2)the installer holds a document issued by the person or organisation that has manufactured the CMU component, which declares the name and identification of the component, the conformity of the component with its design data, and contains the issuance date.
IR · 21.A.308 — Regulation (EU) No 748/2012 · Regulation (EU) 2024/1108 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025