Gas turbine brush seal arrangement for cabin air supply

The engine has a crankcase whose outer shell is fixed to an annular structure (7) by a joint with brush (50) fixed to a periphery of an upstream part of an outer case (12) of a diffuser grid (10). The joint has radially extending bristles (52) supported on an inner surface (54) of a cylindrical sleeve (53). The sleeve integrated to the structure that is connected to an outer shell (6) of a compressor (1), surrounds the joint.