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POWER PLANT
ENGINE
A318/A319/A320/A321 FLEET DSC-70-10 P 3/4
FCOM 19 AUG 10
ACCESSORY GEARBOX
The accessory gearbox, located at the bottom of the fan case, receives torque from horizontal HP
rotor drive shaft and drives gearbox mounted accessories.
DESCRIPTION
Applicable to: MSN
4566,,,
LOW-PRESSURE (LP) COMPRESSOR/TURBINE
The low-speed rotor (N1) consists of a front fan (single-stage) and a four-stage LP compressor
connected to a five-stage LP turbine.
HIGH-PRESSURE (HP) COMPRESSOR/TURBINE
The high-speed rotor (N2) consists of a ten-stage HP compressor connected to a two-stage HP
turbine.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
ENGINE
A318/A319/A320/A321 FLEET DSC-70-10 P 4/4
FCOM 19 AUG 10
COMBUSTION CHAMBER
The annular combustion chamber is fitted with 20 fuel nozzles and 2 igniters.
ACCESSORY GEARBOX
The accessory gearbox, located at the bottom of the fan case, receives torque from horizontal HP
rotor drive shaft and drives gearbox mounted accessories.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
FADEC
A318/A319/A320/A321 FLEET DSC-70-20 P 1/8
FCOM 19 AUG 10
GENERAL
Applicable to:
, ,
MSN
Each powerplant has a FADEC (Full Authority Digital Engine Control) system.
FADEC, also called the Electronic Control Unit (ECU), is a digital control system that performs
complete engine management.
FADEC has two-channel redundancy, with one channel active and one in standby.
If one channel fails, the other automatically takes control.
The system has a magnetic alternator for an internal power source.
FADEC is mounted on the fan case.
The Engine Interface Unit (EIU) transmits to FADEC the data it uses for engine management.
GENERAL
Applicable to: MSN
4566,,,
Each powerplant has a FADEC (Full Authority Digital Engine Control) system.
FADEC, also called the Electronic Engine Control (EEC), is a digital control system that performs
complete engine management.
FADEC has two-channel redundancy, with one channel active and one in standby.
If one channel fails, the other automatically takes control.
The system has a magnetic alternator for an internal power source.
FADEC is mounted on the fan case.
The Engine Interface Unit (EIU) transmits to FADEC the data it uses for engine management.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
FADEC
A318/A319/A320/A321 FLEET DSC-70-20 P 2/8
FCOM 19 AUG 10
FUNCTIONS
Applicable to:
, ,
MSN
The FADEC system performs the following functions :
Control of gas generator
• control of fuel flow
• acceleration and deceleration schedules
• variable bleed valve and variable stator vane schedules
• control of turbine clearance
• idle setting
Protection against engine exceeding limits
• protection against N1 and N2 overspeed
• monitoring of EGT during engine start
Power management
• automatic control of engine thrust rating
• computation of thrust parameter limits
• manual management of power as a function of thrust lever position
• automatic management of power (A/THR demand).
Automatic engine starting sequence
• control of :
‐ the start valve (ON/OFF)
‐ the HP fuel valve
‐ the fuel flow
‐ the ignition (ON/OFF)
• monitoring of N1, N2, FF and EGT
• initiation of abort and recycle (on the ground only)
Manual engine starting sequence
• passive monitoring of engine
• control of :
‐ the start valve
‐ the HP fuel valve
‐ the ignition
Thrust reverser control
• Actuation of the blocker doors
• Engine setting during reverser operation
Fuel recirculation control
• Recirculation of fuel to the fuel tanks, depending on the engine oil temperature, the fuel system
configuration, and the flight phase.
A318/A319/A320/A321 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
FADEC
A318/A319/A320/A321 FLEET DSC-70-20 P 3/8
FCOM 19 AUG 10
Transmission of engine parameters and engine monitoring information to cockpit
indicators
• Primary engine parameters
• Starting system status
• Thrust reverser system status
• FADEC system status
Detection, isolation, and recording of failures
FADEC cooling
FUNCTIONS
Applicable to: MSN
4566,,,
The FADEC system performs the following functions :
　
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