A nosecone assembly for a gas turbine engine having an axially extending centerline, the assembly comprising: a nosecone body having at least one wall extending between a forward end and an aft end, the wall at least in part defines an interior cavity of the nosecone body, the wall having an interior surface contiguous with the interior cavity, and at least one window aperture extending through the wall; and at least one access panel having a first face surface and an opposite second face surface, a first end, a second end, a first lateral edge, and a second lateral edge, wherein the first lateral edge extends between the first end and the second end, and the second lateral edge extends between the first end and the second end, wherein the at least one access panel includes an attachment region disposed on the first face surface and wherein the at least one access panel is attached to the wall interior surface within the attachment region that includes a first attachment region portion partially contiguous with a second attachment region portion, the first attachment region portion and the second attachment region portion collectively define an interior unattached region disposed between at least a length of the first attachment region portion and at least a length of the second attachment region portion, and wherein the interior unattached region is aligned with the window aperture, wherein the first lateral edge extends a first distance between the first end and the second end, and the first attachment region portion extends a second distance along the first lateral edge from the second end towards the first end, characterised in that: the second distance is less than the first distance. a nosecone body having at least one wall extending between a forward end and an aft end, the wall at least in part defines an interior cavity of the nosecone body, the wall having an interior surface contiguous with the interior cavity, and at least one window aperture extending through the wall; and at least one access panel having a first face surface and an opposite second face surface, a first end, a second end, a first lateral edge, and a second lateral edge, wherein the first lateral edge extends between the first end and the second end, and the second lateral edge extends between the first end and the second end, wherein the at least one access panel includes an attachment region disposed on the first face surface and wherein the at least one access panel is attached to the wall interior surface within the attachment region that includes a first attachment region portion partially contiguous with a second attachment region portion, the first attachment region portion and the second attachment region portion collectively define an interior unattached region disposed between at least a length of the first attachment region portion and at least a length of the second attachment region portion, and wherein the interior unattached region is aligned with the window aperture, wherein the first lateral edge extends a first distance between the first end and the second end, and the first attachment region portion extends a second distance along the first lateral edge from the second end towards the first end, characterised in that: the second distance is less than the first distance.