CAO.A.090 Record-keeping

(a) The CAO shall retain the following records:

(1)  the maintenance records necessary to demonstrate that all requirements of this Annex have been met for the issuance of the CRS, including the subcontractor’s release documents; the CAO shall provide a copy of each CRS to the owner of the aircraft, together with a copy of any specific repair or modification data used for the repairs or modifications carried out;

(2)  the continuing airworthiness management records required by any of the following:

(i)  point M.A.305 and, if applicable, point M.A.306 of Annex I (Part-M);

(ii)  point ML.A.305 of Annex Vb (Part-ML);

(3)  where the CAO has the privilege referred to in point (c) of point CAO.A.095, it shall retain a copy of each airworthiness review certificate (ARC) issued in accordance with point (a) of point ML.A.901 of Annex Vb (Part-ML) and recommendation issued or, as applicable, extended, together with all supporting documents;

(4)  where the CAO has the privilege referred to in point (d) of point CAO.A.095, it shall retain a copy of each permit to fly issued in accordance with point 21.A.729 of Annex I (Part-21) to Regulation (EU) No 748/2012.

(b) The CAO shall retain a copy of the records described in point (a)(1), and any associated maintenance data, for a period of 3 years from the date at which it released to service the aircraft or aircraft component to which the work relates.

(c) The CAO shall retain a copy of the records referred to in points (a)(2) to (a)(4) for a period of 2 years from the date at which the aircraft has been permanently withdrawn from service.

(d) All records shall be stored in a manner that ensures protection from damage, alteration and theft.

(e) All computer hardware used for backup of the maintenance records shall be stored in a different location from that containing those data and in an environment that ensures that they remain in good condition.

(f) Where the continuing airworthiness management of an aircraft is transferred to another organisation or person, all the records retained under points (a)(2) to (a)(4) shall be transferred to that organisation or person. From the moment of the transfer, points (b) and (c) shall apply to that organisation or person.

(g) Where the CAO terminates its operation, all retained records shall be transferred as follows:

(1)   the records referred to in point (a)(1) shall be transferred to the last owner or customer of the respective aircraft or component or shall be stored as specified by the CAA;

(2)  the records referred to in point (a)(2) to (a)(4) shall be transferred to the owner of the aircraft.