Patent ID: 8166746

Claim:
A method of preventing substantial load transmission to a structure of a gas turbine engine upon bursting of a centrifugal compressor impeller thereof, the centrifugal compressor impeller being mounted for rotation about an axis, the method comprising: at least partially surrounding the centrifugal compressor impeller with a diffuser ring, the diffuser ring having a circumferentially extending containment surface at least partially surrounding the compressor impeller, the diffuser ring having first and second opposed radial surfaces extending radially with respect to the axis of rotation of the centrifugal compressor impeller; frangibly attaching the first radial surface of the diffuser ring to the structure, such that the first radial surface of the diffuser ring is detached from the structure under a predetermined load impact; and separately frangibly attaching the second opposed radial surface of the diffuser ring to the structure such that the second radial surface of the diffuser ring is also detached from the structure under the predetermined load impact.