Part-145 Maintenance Certification and Records

(a)A certificate of release to service shall be issued by appropriately authorised certifying

staff on behalf of the organisation when that certifying staff has verified that all the

maintenance that was ordered has been properly carried out by the organisation in accordance

with the procedures specified in point 145.A.70, taking into account the availability and use of

the maintenance data specified in point 145.A.45, and that there are no known non-compliances

which endanger flight safety.

(b)A certificate of release to service shall be issued before flight at the completion of any

maintenance.

(c)New defects or incomplete maintenance work orders identified during the maintenance shall be

brought to the attention of the person or organisation responsible for the aircraft continuing

airworthiness for the specific purpose of obtaining agreement to rectify such defects or

completing the missing elements of the maintenance work order. In the case where that person or

organisation declines to have such maintenance carried out under this point, point (e) is

applicable.

(d)A certificate of release to service shall be issued by appropriately authorised certifying

staff on behalf of the organisation after the maintenance that was ordered has been carried out

on a component whilst it was off the aircraft. The authorised release certificate “EASA Form 1”

referred to in Appendix II of Annex I (Part-M) constitutes the component certificate of release

to service except if otherwise specified in point M.A.502 of Annex I (Part-M) or ML.A.502 of

Annex Vb (Part-ML), as applicable. When an organisation maintains a component for its own use,

the EASA Form 1 may not be necessary if the organisation’s internal release procedures in its

MOE so provides.

(e)By derogation to point (a), when the organisation is unable to complete all maintenance

ordered, it may issue a certificate of release to service within the approved aircraft

limitations. The organisation shall enter such fact in the aircraft certificate of release to

service before the issue of such certificate.

(f)By way of derogation from point 145.A.50(a) and point 145.A.42, when an aircraft is grounded

at a location other than the main line station or main maintenance base due to the

non-availability of a component with the appropriate release certificate, the organisation

contracted for the maintenance of that aircraft may temporarily fit a component without the

appropriate release certificate for a maximum of 30 flight hours or until the aircraft first

returns to the main line station or main maintenance base, whichever is the sooner, subject to

the agreement of the person or organisation responsible for the aircraft’s continuing

airworthiness and subject to that component having a suitable release certificate but otherwise

in compliance with all applicable maintenance and operational requirements. Such components

shall be removed by the time limit provided for in the first sentence of this point unless an

appropriate release certificate has been obtained in the meantime under points 145.A.50(a) and

145.A.42.

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

(a)Maintenance records

(1)The organisation shall record the details of the maintenance work that is carried out within

the scope of its approval. As a minimum, the organisation shall retain all the records that are

necessary to prove that all the requirements have been met for the issue of the certificate of

release to service, including, if any, subcontractor's release documents.

(2)The organisation shall provide a copy of each certificate of release to service to the

operator or customer, together with copies of the detailed maintenance records that are

associated with the work carried out and that are necessary to demonstrate compliance with point

M.A.305 of Annex I (Part-M) or ML.A.305 of Annex Vb (Part-ML), as applicable.

(3)The organisation shall retain a copy of all detailed maintenance records (including

certificates of release to service) and of any associated maintenance data for 3 years from the

date when the aircraft or component to which the work relates was issued with a certificate of

release to service.

(4)If an organisation terminates its operation, it shall transfer all the retained maintenance

records that cover the last 3 years to the last customer or owner of the respective aircraft or

component, or shall store them in the manner specified by the competent authority.

[…]

(c)Management system, contracting and subcontracting records

The organisation shall ensure that the following records are retained for a minimum period of 5

years:

(i)records of management system key processes referred to in point 145.A.200;

(ii)contracts, both for contracting and subcontracting, referred to in point 145.A.205.

[…]

(d)Personnel records

[…]

(4)Personnel records shall be kept for as long as a person works for the organisation, and

shall be retained for at least 3 years after the person has left the organisation, or after an

authorisation issued to that person has been withdrawn.

[…]

(g)The records shall be stored in a manner that ensures that they are protected from damage,

alteration and theft.

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