75 - (PW11) - AIR

75-24 (PW11) - TURBINE ACTIVE CLEARANCE CONTROL (ACC)
75-26 (PW11) - ENGINE BEARING COOLING
75-31 (PW11) - VARIABLE STATOR VANE (VSV) SYSTEM
75-32 (PW11) - COMPRESSOR BLEED AIR
75-41 (PW11) - CORE AIR TEMPERATURE