Patent ID: 7909573

Claim:
A casing cover for enclosing a casing in a jet engine, comprising: first and second coaxial shells, the first coaxial shell being arranged inside the second coaxial shell; and radial envelopes connecting the first coaxial shell to the second coaxial shell, wherein radial arms of the casing radially extend inside the radial envelopes, wherein the cover is fastened at a downstream end of the first coaxial shell to a first element of the casing and an upstream end of the second coaxial shell axially abuts against a second element of the casing, the downstream end of the first coaxial shell includes an annular flange and the upstream end of the second coaxial shell includes a radial lip, and wherein an axial dimension of the cover between the downstream end of the first coaxial shell and the upstream end of the second coaxial shell in a free state is less than an axial distance of the casing between the point where the first element of the casing is fastened to the downstream end of the first coaxial shell and the point where the second element of the casing abuts the upstream end of the second coaxial shell such that the cover is tensioned axially when mounted on and fastened to the casing.