CHAPTER 72
__________
 ENGINE
 TABLE OF CONTENTS
_________________
 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY
________ C ____ ___________ TURBINE FRAME ASSEMBLY 72-56-00
 REPAIRS 801 ALL Replacement of Defective Studs 801 ALL Replacement of Defective or 805 ALL Missing Thermal Insulation Blankets (On Radial Struts TRF Only) Replacement of the Oil Supply Tube 808 ALL Assembly
 ACCESSORY DRIVE SECTION 72-60-00
_______________________ DESCRIPTION AND OPERATION 1 ALL General 1 ALL
 INLET GEARBOX ASSEMBLY 72-61-00
 DESCRIPTION AND OPERATION 1 ALL General 1 ALL Description 1 ALL Horizontal Bevel Gear 1 ALL Radial Bevel Gear 1 ALL Thrust Bearing (No. 3 Ball) 1 ALL Roller Bearing (No. 3 Roller) 1 ALL
 TRANSFER GEARBOX ASSEMBLY 72-62-00
 DESCRIPTION AND OPERATION 1 ALL General 1 ALL Description 1 ALL Radial Drive Shaft Assembly 1 ALL TGB Assembly 1 ALL
 TRANSFER GEARBOX ASSEMBLY 72-62-00
 REMOVAL/INSTALLATION 401 ALL Removal of the Transfer Gearbox 401 ALL Module Installation of the Transfer 418 ALL Gearbox Module
 TRANSFER GEARBOX ASSEMBLY 72-62-00
 INSPECTION/CHECK 601 ALL Inspection/check of the Transfer 601 ALL Gearbox Assembly
 ACCESSORY GEARBOX ASSEMBLY 72-63-00 DESCRIPTION AND OPERATION 1 ALL
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 CHAPTER 72
__________
 ENGINE
 TABLE OF CONTENTS
_________________
 SUBJECT_______ CH/SE/SU _ PAGE EFFECTIVITY
________ C ____ ___________ General 1 ALL Description 1 ALL
 Horizontal Drive Shaft Assembly 1 ALL AGB Housing 1 ALL Gear Train 8 ALL
 ACCESSORY GEARBOX ASSEMBLY 72-63-00
 MAINTENANCE PRACTICES 201 ALL Disengagement/Engagement of the 201 ALL Horizontal Drive Shaft
 ACCESSORY GEARBOX ASSEMBLY 72-63-00
 REMOVAL/INSTALLATION 401 ALL Removal of the Handcranking Drive 401 ALL Cover Installation of the Handcranking 405 ALL Drive Cover Removal of the Accessory Gearbox 409 ALL Assembly Installation of the Accessory 438 ALL Gearbox Assembly
 ACCESSORY GEARBOX ASSEMBLY 72-63-00
 INSPECTION/CHECK 601 ALL Inspection/Check of the Accessory 601 ALL Gearbox Assembly
 ACCESSORY GEARBOX ASSEMBLY 72-63-00
 REPAIRS 801 ALL Replacement of a Sealol Seal 801 ALL (Typical) Replacement of a Magnetic Seal 813 ALL (Typical) Replacement of a Magnetic Seal 822 ALL (IDG and Starter Drive Pads).
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 ENGINE - GENERAL - DESCRIPTION AND OPERATION

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 1. General

_______ (Ref. Fig. 001, 002, 003, 004) The engine is a dual-rotor, variable stator, high bypass ratio turbo fan power plant. The 9 stage high pressure compressor is driven by 1 stage high pressure turbine, and the integrated front fan and booster is driven by 4 stage low pressure turbine. An annular combustor converts fuel and compressor discharge air into energy to provide engine thrust part through primary exhaust and to drive the turbines. The accessory drive system extracts energy from the high pressure rotor to drive the engine accessories and the engine mounted aircraft accessories. Reverse thrust for braking the aircraft after landing is supplied by an integrated system which acts on the fan discharge airflow (Ref. 78-00-00).

 2. Engine Modules

______________ The principal modules of the engine are fan and booster, high pressure compressor, combustor chamber, high pressure turbine, low pressure turbine and accessory drive gearbox. Detailed descriptions of the components of each section are given in corresponding sections of this document. The description of each engine module is as follows:
 A. Fan/Booster Rotor The fan rotor consists of one full diameter booster for the secondary flow single stage fan and a smaller 4 Stage booster for the core engine flow. The fan and the booster are mounted on a common internal concentric shaft driven by the fan pressure turbine. Two bearings support the fan assembly in the frame.
 B. Fan/Booster Stator Fixed stator vanes are provided for both, the fan and booster rotor. The fan casing, in which the stator is mounted has provision for blade containment forward of and in the plan of the fan rotor. The casing is supported by the fan frame and supports the accessory drive gearbox.
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 Engine LH Side
 Figure 001

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