Described is a gas turbine engine, comprising: a first chamber (330) and a second chamber (332) separated by a partition wall (322); wherein the partition wall (322) includes a stationary element and a rotating element separated by a seal and either of the stationary element and the rotating element of the partition wall (322) is segmented by a levered joint (346), wherein the levered joint (346) includes a lever (348) having a trigger plate (350), a fixture portion (352) and a fulcrum portion (354); and, the other of the stationary element and rotating element includes a hammer 360 which is axially aligned and separated from the trigger plate (350) in a first position, and forcibly contacts the hammer (360) portion in a second position so as to create a moment on the lever (348) via the trigger plate (350), the moment forcing the levered joint apart.