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 REMOVAL/INSTALLATION 401 ALL Removal of the Bleed Valve Fuel 401 ALL Gear Motor Assembly Installation of the Bleed Valve 405 ALL Fuel Gear Motor Assembly
 STOP MECHANISM 75-31-20
 REMOVAL/INSTALLATION 401 ALL Removal of the Bleed Valve Stop 401 ALL Mechanism Installation of the Bleed Valve 409 ALL Stop Mechanism
 STOP MECHANISM 75-31-20
 ADJUSTMENT/TEST 501 ALL Set the Variable Bleed Valve 501 ALL Assembly to the Closed position
 FLEXIBLE SHAFT ASSEMBLY 75-31-30
 REMOVAL/INSTALLATION 401 ALL Removal of a VBV Inter-connecting 401 ALL Flexible Shaft (Typical). Installation of a VBV 405 ALL Inter-connecting Flexible Shaft (Typical) Removal of the VBV System Main 409 ALL Flexible Shaft Installation of the VBV System 413 ALL Main Flexible Shaft
 FLEXIBLE SHAFT ASSEMBLY 75-31-30
 INSPECTION/CHECK 601 ALL Visual Inspection of the VBV Main 601 ALL Flexible Shaft and the VBV Inter-connecting Flexible Shafts
 MASTER BALLSCREW ACTUATOR 75-31-50
 REMOVAL/INSTALLATION 401 ALL Removal of the Bleed Valve and 401 ALL Master Ballscrew Actuator Assembly Installation of the Bleed Valve 409 ALL and Master Ballscrew Actuator Assembly
 BALLSCREW ACTUATOR 75-31-60
 REMOVAL/INSTALLATION 401 ALL Removal of the Bleed Valve and 401 ALL Ballscrew Actuator Assembly Installation of the Bleed Valve 405 ALL
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 CHAPTER 75
__________
 AIR
 TABLE OF CONTENTS
_________________
 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY
________ C ____ ___________ and Ballscrew Actuator Assembly VARIABLE BLEED VALVE SENSOR (RVDT) 75-31-70
 REMOVAL/INSTALLATION 401 ALL Removal of the Variable Bleed 401 ALL Valve position Sensor Installation of the Variable Bleed 406 ALL Valve position Sensor
 VARIABLE STATOR VANE SYSTEM (VSV) 75-32-00
 DESCRIPTION AND OPERATION 1 ALL General 1 ALL Component Location 1 ALL Description 1 ALL Variable Stator Vane Actuator 5 ALL General 5 ALL Description 5 ALL Operation 5 ALL VSV Position Feedback Transducer 5 ALL General 5 ALL Description 8 ALL
 VARIABLE STATOR VANE ACTUATOR AND SENSOR 75-32-10 (LVDT)
 REMOVAL/INSTALLATION 401 ALL Removal of the Variable Stator 401 ALL Vane (VSV) Actuators Installation of the Variable 410 ALL Stator Vane (VSV) Actuators
 VARIABLE STATOR VANE ACTUATOR AND 75-32-10
 SENSOR (LVDT)

 INSPECTION/CHECK 601 ALL Inspection of the Variable Stator 601 ALL Vane Actuator
 NACELLE TEMPERATURE INDICATING 75-41-00
 DESCRIPTION AND OPERATION 1 ALL General 1 ALL Description 1 ALL
 SENSOR - NACELLE TEMPERATURE 75-41-15
 REMOVAL/INSTALLATION 401 ALL Removal of the Nacelle Temperature 401 ALL Sensor Installation of the Nacelle 405 ALL Temperature Sensor
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 AIR - GENERAL - DESCRIPTION AND OPERATION

_________________________________________
 1. General
_______
 (Ref. Fig. 001, 002, 003)
 The air system covers primary, secondary (by pass) and parasitic (cooling
 and pressurizing) airflows and the systems used to control airflow.
 A. Engine Section The airstream flowing through the engine supplies air systems using propulsion airflow (secondary and primary flows) or ambient air.
 (1) Engine anti-icing
 (Ref. 30-21-00)

 (2) Cooling
 (Ref. 75-20-00)

 (a) Front and rear bearing sump pressurizing air. (Ref. 72-00-00)

 (b) Cooling air.
 (Ref. 75-25-00)

 (c) Rotor active clearance control and start bleed system (RACSB) (Ref. 75-23-00)

 (d) HPT active clearance control system
 (Ref. 75-21-00)

 (e) Low pressure turbine active clearance control. (Ref. 75-22-00)

 (f) High-energy igniter harness cooling air.
 (Ref. 75-22-00)

 (g) Engine bleed air.

 (h) ECU cooling.
 (Ref. 75-24-00)

 

 (3) Engine Control

 (a) Fuel control system air.

 (b) Compressor control
 (Ref. 75-30-00)

 

 

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 Engine Airflow
 Figure 001

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