A fan case assembly for a gas turbine engine comprising: a honeycomb structure; a septum operatively coupled to the honeycomb structure and located radially inward of the honeycomb structure to serve as a buffer protecting the honeycomb structure from erosion, the septum extending axially from a forward end to an aft end, wherein the forward end is angled and extends radially inward from the honeycomb structure and the aft end is angled and extends radially inward from the honeycomb structure; and a rubstrip in contact with the septum and located radially inward of the septum, the rubstrip extending axially from a front end to an aft end and circumferentially along a fan blade tip path, and including a first axial section, a second axial section, and a third axial section, the first axial section and the third axial section having a radial thickness greater than a radial thickness of the second axial section, the second axial section positioned for contact with an outer tip of a rotatable fan blade located within the fan case assembly; characterized in that: axial ends of the first and third axial sections (86, 88) of the rubstrip are angled, and the first and third axial sections (86, 88) are axially positioned within angled faces of the septum, so that the angled faces substantially correspond to respective axial ends of the thickened first and third axial sections (86, 88) of the rubstrip; wherein said thickened sections (86,88) of the rubstrip do not extend past the respective angled forward and aft ends (92,94) of the septum, so that the angled faces of the angled ends (92, 94) of the septum substantially correspond to a front axial end of the first thickened section and to an aft axial end of the third thickened section respectively, wherein the septum includes an integrally formed bumper portion having a radial thickness greater than a radial thickness of other portions of the septum, the bumper portion being axially aligned with the second axial section of the rubstrip and defining at least one slot, the slot extending radially outward from the second axial section of the rubstrip and in a circumferential direction. a honeycomb structure; a septum operatively coupled to the honeycomb structure and located radially inward of the honeycomb structure to serve as a buffer protecting the honeycomb structure from erosion, the septum extending axially from a forward end to an aft end, wherein the forward end is angled and extends radially inward from the honeycomb structure and the aft end is angled and extends radially inward from the honeycomb structure; and a rubstrip in contact with the septum and located radially inward of the septum, the rubstrip extending axially from a front end to an aft end and circumferentially along a fan blade tip path, and including a first axial section, a second axial section, and a third axial section, the first axial section and the third axial section having a radial thickness greater than a radial thickness of the second axial section, the second axial section positioned for contact with an outer tip of a rotatable fan blade located within the fan case assembly; characterized in that: axial ends of the first and third axial sections (86, 88) of the rubstrip are angled, and the first and third axial sections (86, 88) are axially positioned within angled faces of the septum, so that the angled faces substantially correspond to respective axial ends of the thickened first and third axial sections (86, 88) of the rubstrip; wherein said thickened sections (86,88) of the rubstrip do not extend past the respective angled forward and aft ends (92,94) of the septum, so that the angled faces of the angled ends (92, 94) of the septum substantially correspond to a front axial end of the first thickened section and to an aft axial end of the third thickened section respectively, wherein the septum includes an integrally formed bumper portion having a radial thickness greater than a radial thickness of other portions of the septum, the bumper portion being axially aligned with the second axial section of the rubstrip and defining at least one slot, the slot extending radially outward from the second axial section of the rubstrip and in a circumferential direction. axial ends of the first and third axial sections (86, 88) of the rubstrip are angled, and the first and third axial sections (86, 88) are axially positioned within angled faces of the septum, so that the angled faces substantially correspond to respective axial ends of the thickened first and third axial sections (86, 88) of the rubstrip; wherein said thickened sections (86,88) of the rubstrip do not extend past the respective angled forward and aft ends (92,94) of the septum, so that the angled faces of the angled ends (92, 94) of the septum substantially correspond to a front axial end of the first thickened section and to an aft axial end of the third thickened section respectively, wherein the septum includes an integrally formed bumper portion having a radial thickness greater than a radial thickness of other portions of the septum, the bumper portion being axially aligned with the second axial section of the rubstrip and defining at least one slot, the slot extending radially outward from the second axial section of the rubstrip and in a circumferential direction.