EFFECTIVITY
ALL CFM56 ENGINES
CFMI PROPRIETARY INFORMATION
CFM56-ALL
TRAINING MANUAL
BASIC ENGINE
PARTICULARS
BORESCOPE INSPECTION
Page 44
Sep 03
ACCESSORY DRIVE SYSTEM
(ALL) :
At engine start, the accessory drive system transmits
external power from the engine air starter to drive the
core engine.
When the engine is running, the accessory drive system
extracts part of the core engine power and transmits it
through a series of gearboxes and shafts in order to drive
the engine and aircraft accessories.
(-2, -5A, -5B, -5C) :
The accessory drive system is located at 6 o’clock and
consists of the following components:
(-3, -7B) :
The accessory drive system is located at 9 o’clock
and consists of the following components:
(ALL) :
- The Inlet Gearbox (IGB), that takes power from the
HPC front shaft.
- The Radial Drive Shaft (RDS), that transmits the
power to the Transfer Gearbox.
- The Transfer Gearbox (TGB), which redirects the
torque.
- The Horizontal Drive Shaft (HDS), that transmits
power from the TGB to the Accessory Gearbox.
- The Accessory Gearbox (AGB), that supports and
drives both engine and aircraft accessories.
(-2) :
For maintenance tasks, the core can be turned manually
through a handcranking pad on left side of the TGB.
(-3, -5A, -5B, -5C, -7B) :
For maintenance tasks, the core can be turned manually
through a handcranking pad on the front face of the AGB.
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