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FIN:
LOCATION
ZONE: 311, 312
PRESSURE-OFF BRAKES
IDENTIFICATION
FIN:
LOCATION
ZONE: 311, 312
TMUFCLU01-T01 LEVEL 3
EFFECTIVITY 27-40-00 Page 4
May 31/96
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 102
ALL
27 - FLIGHT CONTROLS
27-00-00 ROLL CONTROL NORMAL D/O
CONTENTS:
Side Stick
Elevator Aileron Computer (ELAC)
Spoiler Elevator Computer (SEC)
Flight Augmentation Computer (FAC)
Flight Management and Guidance Computer (FMGC)
Ailerons
Spoilers
TMUFCT602 LEVEL 3
EFFECTIVITY 27-00-00 Page 1
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 103
ALL
ROLL CONTROL NORMAL D/O
SIDE STICK
The Side stick sends electrical orders to the Elevator
Aileron Computers (ELACs) and Spoiler Elevator
Computers (SECs).
ELAC
There are two ELACs: ELAC 1 normally controls the
ailerons, with ELAC 2 as back-up.
In case of failure of ELAC 1, ELAC 2 will automatically
take control.
SEC
Using orders coming from the ELACs, each SEC sends
orders to one or two pairs of spoilers, without
back-up.
FAC
Flight Augmentation Computer 1 (FAC 1), with FAC 2 as
back-up, transmits turn coordination orders for the
rudder.
FMGC
When the autopilot is engaged, the Flight Management
and Guidance Computer (FMGC) sends roll commands to
the ELACs and the FACs, and to the SECs through the
ELACs.
AILERONS
There are two electrically controlled hydraulic
actuators per aileron, one in active mode, the other
in damping mode.
The left Blue and right Green actuators are controlled
by ELAC 1 and the two other actuators by ELAC 2.
All aileron actuators revert to damping mode in case
of a double ELAC failure or Green and Blue hydraulic
low pressure.
SPOILERS
Each spoiler is powered by one hydraulic actuator.
Surfaces are automatically retracted if a fault is
detected by the monitoring system or if there is no
electrical supply.
In case of loss of hydraulic power supply:
- if retracted, the surface remains retracted,
- if not retracted, the surface will maintain
existing deflection or less if pushed down
by aerodynamic forces (to the zero hinge
moment position).
TMUFCT602-T01 LEVEL 3
EFFECTIVITY 27-00-00 Page 2
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 104
ALL
ROLL CONTROL NORMAL D/O
TMUFCT602-P01 LEVEL 3
EFFECTIVITY 27-00-00 Page 3
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 105
ALL
THIS PAGE LEFT INTENTIONALLY BLANK
TMUFCT602 LEVEL 3
EFFECTIVITY 27-00-00 Page 4
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 106
ALL
27 - FLIGHT CONTROLS
27-00-00 ROLL CONTROL ABNORMAL D/O
CONTENTS
Computer Failures
Servo Control Failures
Electrical Failure
Self Examination
TMUFCT702 LEVEL 1
EFFECTIVITY 27-00-00 Page 1
Mar 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 107
ALL
ROLL CONTROL ABNORMAL D/O
COMPUTER FAILURES
A computer failure can engage a lateral abnormal
configuration. The loss of Elevator Aileron Computer
1 (ELAC 1) leads to select ELAC 2 active.
ELAC 2 computes the lateral orders in normal law and
transmits them to the Spoiler Elevator Computers for
the roll spoilers.
In case of loss of both ELACs only spoilers are
available. The SECs control the roll in direct law and
the yaw damping function normal law is lost.
SERVO CONTROL FAILURES
In case of failure of one aileron servo control, the
second one takes over and is controlled by the other
ELAC.
ELAC 1 still computes the orders and ELAC 2 is in slave
mode. The right green servo control is controlled by
ELAC 1 and the left green servo control by ELAC 2.
In case of failure of both ELAC 1 servo controls, then
ELAC 2 does the computation and controls its servo
controls.
In case of failure of both servo controls of a same
aileron, the other aileron is still operated.
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