- Transfer Gearbox (TGB)

- Horizontal Drive Shaft (HDS)

- Accessory Gearbox (AGB)

At engine start, the accessory drive system transmits external power from the engine air starter to drive the core engine.
For maintenance tasks, there is a hand-cranking pad on the AGB that is used to manually turn the core engine.
Page 2
EFFECTIVITY
72-60-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION

CFM56-5B包H TRAINING  MANUAL
INLET GEARBOX (IGB)
RADIAL DRIVE SHAFT (RDS)
HORIZONTAL
DRIVE SHAFT
(HDS)

ACCESSORY GEARBOX
(AGB)

TRANSFER GEARBOX (TGB)
ACCESSORY DRIVE SECTION DESIGN
CTC-063-026-01
EFFECTIVITY Page 3
72-60-00
Dec 00
ALL CFM56-5B ENGINES FOR A319-A320-A321 BASIC ENGINE

CFMI PROPRIETARY INFORMATION
THE ACCESSORY GEARBOX (AGB)
The AGB assembly is mounted under the fan inlet case at the 6 o’clock position and is secured by 2 clevis mounts.
The AGB consists of a gear train that reduces and increases the rotational speed to drive various engine and aircraft accessories.
The AGB’s front face has mounting pads for the following equipment :
- Lube unit

- Hydraulic pump

- Hand-cranking drive

- Control alternator

- Integrated Drive Generator (IDG)

The AGB’s rear face connects with the Horizontal Drive Shaft (HDS) coupling tube and provides mounting pads for :
- The fuel pump

- The starter

- The N2 speed sensor

The fuel pump and IDG are installed on the AGB through Quick Attach/Detach (QAD) rings.
Page 4
EFFECTIVITY
72-60-00
Dec 00
BASIC ENGINE
ALL CFM56-5B ENGINES FOR A319-A320-A321
CFMI PROPRIETARY INFORMATION

CFM56-5B包H TRAINING  MANUAL
CLEVIS MOUNT
FUEL PUMP/HMU PAD
N2 SPEED SENSOR
MOUNTING PAD

LUBRICATION UNIT PAD
HORIZONTAL
DRIVE COUPLING
TUBE

STARTER PAD
HYDRAULIC PUMP PAD FWD
HANDCRANKING PAD
CLEVIS MOUNT
CONTROL ALTERNATOR PAD

IDG PAD
ACCESSORY GEARBOX HOUSING
CTC-063-027-00
EFFECTIVITY Page 5
72-60-00
Dec 00
ALL CFM56-5B ENGINES FOR A319-A320-A321 BASIC ENGINE

CFMI PROPRIETARY INFORMATION
Sealing
Sealing of the AGB is provided by 2 configurations of carbon-contact seals :
- Magnetic type

- Spring-loaded type

Magnetic seals
The magnetic-type seal consists of :
- a non-magnetic housing, which contains a
magnetized mating ring with a polished face and a
retaining ring.

- a rotating seal with carbon material held in a rotating
ring.