CS-E 110 Drawings and Marking of Parts – Assembly of Parts

(a)The drawings for each Engine component and each item of equipment must give full particulars of the design and must indicate the materials used in terms of their specifications. The protective finish and, where applicable, the surface finish, must be indicated. Any tests necessary to establish the manufacturing quality of components or equipment must be quoted on the relevant drawings either directly or by reference to other suitable documents.

(b)Except where otherwise agreed each part must be marked so that it can be identified with the drawing to which it was made. The position of the markings must be indicated on the drawing.

(c)Certain parts (including Engine Critical Parts, see CS-E 515) as may be required by the Agency must be marked and the constructor must maintain records related to this marking such that it is possible to establish the relevant manufacturing history of the parts.

(d)Turbine Engine parts, the incorrect assembly of which could result in Hazardous Engine Effects, must be designed so as to minimise the risk of incorrect assembly or, where this is not practical, permanently marked so as to indicate their correct position when assembled.

(e)As part of the system safety assessment of CS-E 50(d), the possibility and subsequent effect of incorrect fitment of instruments, sensors or connectors must be assessed. Where necessary, design precautions must be taken to prevent incorrect configuration of the system.