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) a copy of each permit to fly that is issued, and the related documents in accordance with the provisions of point 21.A.5(c)(2) of Annex I (Part 21) or, as applicable, point 21L.A.7(c) of Annex Ib (Part 21 Light) to Regulation (EU) No 748/2012 for a period of 5 years from the date on which the permit to fly was issued; (4) a copy of each airworthiness review certificate and recommendation that are issued, as applicable, together with the airworthiness review report; (5) a copy of each evaluation programme and evaluation report that are issued in accordance with the provisions of point 21.A.174(d) of Annex I (Part 21) or, as applicable, point 21L.A.143(h) of Annex Ib (Part 21 Light) 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 organisation shall retain a copy of all records referred to in points (a)(4) and (a)(5) of this point for a period of 3 years after the continuing airworthiness management of the aircraft in accordance with point M.A.201 of Annex I (Part-M) or point ML.A.201 of Annex Vb (Part-ML), as applicable, has been transferred to another person or organisation. If the organisation issuing the airworthiness review certificate, recommendation, evaluation programme/report or permit to fly is different from the organisation managing the continuing airworthiness of the aircraft, the issuing organisation shall retain a copy of all records referred to in points (a)(3), (a)(4) and (a)(5) and all supporting documents for a period of 5 years from the date on which the airworthiness review certificate, recommendation, evaluation programme/report or permit to fly was issued.

(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)When the continuing airworthiness management of an aircraft is transferred to another organisation or person, all the records retained under points (a)(2) to (a)(5) shall be transferred to that organisation or person. From the moment of the transfer, point (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 competent authority; (2) the records referred to in point (a)(2) to (a)(5) shall be transferred to the owner of the aircraft.