The organisation shall hold and use applicable current maintenance data in accordance with point M.A.401 of Annex I (Part-M) or point ML.A.401 of Annex Vb (Part-ML), as applicable, for the performance of continuing airworthiness tasks referred to in point CAMO.A.315 of this Annex (Part-CAMO). That data may be provided by the owner or the operator, subject to an appropriate contract being established with such an owner or operator. In such case, the continuing airworthiness management organisation shall only keep such data for the duration of the contract, except when otherwise required by point CAMO.A.220(a).
AMC1 CAMO.A.325 Maintenance data provided by the customer
When using maintenance data provided by the customer, the CAMO is responsible for ensuring that this data is current. As a consequence, it should establish appropriate procedures or provisions in the contract with the customer.
GM1 CAMO.A.325 Maintenance data provided by the customer
The sentence ‘except when otherwise required by point (a) of point CAMO.A.220’ refers to, in particular, the need to keep a copy of the customer data which was used to perform continuing airworthiness activities not only during the contract period but also, if considered as record pursuant to point CAMO.A.220(a)(2), for the period specified in point CAMO.A.220(a)(5).
GM2 CAMO.A.325 CAW management tasks vs Airworthiness review
Point CAMO.A.325 refers to ‘continuing airworthiness tasks referred to in point CAMO.A.315’. As a consequence, this covers continuing airworthiness management tasks but not airworthiness reviews.
Airworthiness review requirements are indicated in point CAMO.A.320 and the requirements for the corresponding record retention are contained in point CAMO.A.220.