A shaft for a gas turbine engine includes a shaft bore along an axis, a circumferential groove within the shaft bore, a multiple of first axial grooves from said circumferential groove and a multiple of second axial grooves from said circumferential groove. The configuration allows, when the intraocular lens is pushed out by the plunger, the haptic to enter a gap formed on the concave side of the optical portion which has been deformed in a curved shape. To this end, each spring element has a retaining section by means of which it is fixed to the hub. The method also provides those who need backup transformers a system to obtain access to the required backup without requiring them to purchase a new transformer or to wait for the transformer to be built. The mirror includes a composite with at least one of silicon carbide, boron, and boron carbide and an alloying agent that increases the electrical conductivity of the composite sufficient for the composite to be processed by electrical discharge machining.