Aircraft engine having scroll case with flange connection

An aircraft engine, comprising:

• a turbine including a turbine rotor rotatable about a central axis;
• a scroll case having an inlet fluidly connected to a source of combustion gases and an outlet fluidly connected to the turbine, and a conduit extending around the central axis from the inlet to the outlet, the conduit including a non-axisymmetric portion extending downstream from the inlet and spiraling towards the central axis, and an axisymmetric portion downstream of the non-axisymmetric portion;
• a bearing housing extending around the central axis;
• and
• a flange connecting the scroll case to the bearing housing, the flange having a first end connected to the scroll case, a second end connected to the bearing housing, and a deflecting wall section extending between the first end and the second end, the deflecting wall section being spaced apart from the scroll case by an annular gap, the deflecting wall section of the flange being deformable in a radial direction.