Abstract: A disclosed fan containment case includes a fan case fabricated from a plurality of non-metallic composite layers with an attachment flange formed of both a composite portion and a metallic backing. The disclosed metallic backing is mounted on a rearward facing surface of a composite portion of the attachment flange.

Abstract: A fan section of a gas turbine engine includes nacelle inlet and a fan containment case that are integrally formed together as a single-piece component.

Abstract: A fan section of a gas turbine engine having an axially extending centerline is provided. The fan section includes a fan assembly, a fan containment case, and a plurality of structural exit guide vanes. The fan assembly includes a fan rotor hub centered on and rotatable about the centerline, and a plurality of fan blades that are attached to and extend radially out from the fan rotor hub. The fan containment case is disposed radially outside of and circumferentially around the fan assembly. The fan containment case includes a shell and an integral flange ring that extends around the circumference of the shell, a circumferentially extending blade outer air seal disposed between the fan blades and the shell. The structural exit guide vanes are mechanically attached to the fan containment case at a position aligned with the integral flange ring.

Abstract: A gas turbine engine fan section includes first and second composite layers providing a generally cylindrical case. Axially spaced apart rings are arranged between the first and second composite layers and form reinforcing ribs that provide a fan containment area axially between the rings. A belt is arranged over and spans the fan containment area between the reinforcing ribs. A fan blade has a tip in proximity to the first composite layer without any intervening structural support between the tip and the first composite layer, which provides a fan blade rub resistant surface. A method of manufacturing a fan containment case includes wrapping at least one first composite layer around a mandrel. Axially spaced apart rings are arranged circumferentially about the first composite layer. At least one second composite layer is wrapped around the rings and first composite layer to provide reinforcing ribs at the rings.

Abstract: A fan section of a gas turbine engine includes nacelle inlet and a fan containment case that are integrally formed together as a single-piece component.