Article L122-3 of the French Civil Aviation Code
The mortgage may be extended on an ancillary basis to spare parts corresponding to the type of the mortgaged aircraft(s) provided that said parts are individualised. These spare parts are stored in one or more locations which are subject to the publicity provided for in article L. 122-4. When they are used on the aircraft to which they are assigned, they must be replaced immediately. The creditor shall be notified…