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IDG COOLING
Fan air is used to cool the IDG oil through the air/oil cooler. A bypass valve opens when oil is too
cold and cannot flow easily through the cooler.
ENGINE STABILITY
Applicable to: ,
Two air bleed systems provide greater compressor stability in different flight phases. The volume
of airflow through the intermediate pressure and low pressure compressors is regulated by four
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
AIRBLEED SYSTEM
A330/A340 FLEET DSC-70-60 P 4/4
FCOM 19 AUG 10
intermediate pressure stage 8, and three high pressure stage 3, bleed valves controlled by the
FADEC. At low engine speed, the bleed valves are open to prevent engine stall.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
THRUST REVERSER SYSTEM
A330/A340 FLEET DSC-70-70 P 1/8
FCOM 19 AUG 10
GENERAL
Applicable to:
The aircraft reverses engine thrust by using four pivoting blocker doors on each engine to deflect the
fan airstream.
A hydraulic door jack positions each door .
The green circuit powers ‐ the doors on ENG 1 and ENG 4.
‐ The blue circuit powers the doors on ENG 2.
‐ The yellow circuit powers the doors on ENG 3.
The thrust reverser system is independently-controlled for each engine by the associated FADEC.
It is controlled and monitored by each FADEC channel. The thrust reverser system on each engine
includes :
‐ 4 actuators
‐ 4 latches
‐ door position switches
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
THRUST REVERSER SYSTEM
A330/A340 FLEET DSC-70-70 P 2/8
FCOM 19 AUG 10
‐ A shut off valve which allows the hydraulic pressure to the HCU.
‐ a Hydraulic Control Unit (HCU) which :
• pressurizes the thrust reverser hydraulic system
• regulates the blocker doors speed
• supplies actuators with hydraulic power
Each pivoting door moves independently (no synchronization). The total actuation time is less than
2 s.
GENERAL
Applicable to: ,
The aircraft reverses engine thrust by using four pivoting blocker doors on each engine to deflect the
fan airstream.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
THRUST REVERSER SYSTEM
A330/A340 FLEET DSC-70-70 P 3/8
FCOM 19 AUG 10
A hydraulic door jack positions each door.
‐ the blue circuit powers the doors on engine 1.
‐ the yellow circuit powers the doors on engine 2.
The thrust reverser system is independently-controlled for each engine by the associated
FADEC. It is controlled and monitored by each FADEC channel. The translating cowls are
hydraulically-actuated. The thrust reverser system on each engine includes :
‐ 4 pivoting blocker doors each activated by an hydraulic actuator ;
‐ A hydraulic isolation valve controlled by the FADEC ;
‐ A directional control valve, which directs hydraulic pressure to 4 hydraulic locks and to the deploy
or stow line ;
‐ 4 independant electrical locks controlled by the FADEC
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
POWER PLANT
THRUST REVERSER SYSTEM
A330/A340 FLEET DSC-70-70 P 4/8
FCOM 19 AUG 10
4 stow proximity switches and 4 lock switches to ‐ monitor whether the translating cowls are
deployed or stowed and locked
‐ 4 tertiary locks (one for each of the pivoting doors) allowing to maintain the reverse in locked
position through a door pin. During engine reverse thrust, a solenoid allows to release the door
pin.
ACTUATION LOGIC
Applicable to:
Deployment requires :
‐ One FADEC channel, operating with its associated throttle reverse signal.
‐ Aircraft on ground signal from at least one LGCIU.
‐ TLA reverse signal from PRIM 1 (FLT CTL PRIMARY COMPUTER 1), or associated PRIM.
‐ Switch reverse signal from associated EIU.
Before the transit completion of the blocker doors, the FADEC sets reverse idle thrust.
ACTUATION LOGIC
Applicable to: ,
Deployment requires :
‐ TLA reverse signals from FADEC and from the flight control primary computer (PRIM 1 or PRIM
3).
‐ One FADEC channel, operating with its associated throttle reverse signal.
‐ Aircraft on ground signal from at least one LGCIU.
During deployment, engine reverse thrust is limited to idle, until the reversers are deployed by more
than 70 %. Then, FADEC will command full reverse thrust to be available when reversers position
are more than 90 % deployed.
ENG 1 AND 4 THRUST REVERSER LEVER INTERLOCK
Applicable to:
Thrust reverser lever interlock prevents the application of asymmetrical reverse thrust on the
　
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