Patent ID: 6968701

Claim:
An engine having an integrated auxiliary power unit comprising: a low pressure spool including a low pressure compressor and a low pressure turbine; a high pressure spool including a high pressure compressor and a high pressure turbine; means for independently operating said high pressure spool so that said high pressure spool functions as said auxiliary power unit; said operating means including at least one means for blocking air flow through said engine and for supplying said air to an inlet of said high pressure compressor; said engine including an intermediate pressure compressor, said at least one blocking and air supplying means comprising at least one inlet port for supplying air to an inlet of said high pressure compressor and said at least one inlet port being located between said intermediate pressure compressor and said high pressure compressor; and each said at least one inlet port comprising a first flap in an external wall of said nacelle, a second flap in an internal wall of said nacelle, and a duct extending between said first flap and said second flap.