Abstract: A coupling assembly for connecting the aft end of an air duct to the compressor rear shaft in a gas turbine engine includes a retaining ring disposed in the central bore of the compressor rear shaft. The retaining ring has a first set of tabs extending axially therefrom, and the air duct has a second set of tabs extending axially from its aft end. The aft end of the air duct is disposed in the bore and positioned relative to the retaining ring so that the first set of tabs intermeshes with the second set of tabs.

Abstract: A stator vane liner assembly includes seal keys supported in slots in the ends of vane liner segments in an engine casing. Stationary vanes supported in the liner segments for directing an engine airflow are urged against the keys by the engine airflow gas loads. The seal keys engage the ends of adjacent vane liners for sealing, and prevent further motion of the vanes with respect to the liner segments due to the engine airflow gas loads. Secondary seal means can be slidably captured between the seal key and vane liner segment to prevent axial and radial leakage around the seal key. The liner assembly reduces leakage of engine airflow and helps to isolate the engine casing from the thermal effects of leakage of engine airflow.