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UF94200
EFFECTIVITY Page 7
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SAFETY PRECAUTIONS
The precautions to be taken before operating the flight
control surfaces are:
- WARNING: Put safety devices and a warning
notice in position.
- WARNING: Make sure that the travel ranges of
the surfaces are clear before you
pressurize/depressurize a hydraulic
system.
- WARNING: Make sure that the controls agree
with the position of the items they
operate before you pressurize a
hydraulic system.
- WARNING: Make sure that the landing gear
safety locks and the wheel chocks are
in position.
MAINTENANCE PRACTICES
Rigging has to be performed on the three axes including
the slats and flaps.
TMUFCBA02-T04 LEVEL 1
EFFECTIVITY 27-00-00 Page 8
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 8
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SELF EXAMINATION
Which surfaces are used for lift dumping?
A - All spoilers
B - Spoilers 1 to 3
C - Spoilers 1 to 4
Which surfaces are used to control the roll?
A - Spoilers 1 to 5
B - Ailerons and spoilers 3 to 5
C - Ailerons and spoilers 2 to 5.
TMUFCBA02 LEVEL 1
EFFECTIVITY 27-00-00 Page 9
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 9
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUFCBA02 LEVEL 1
EFFECTIVITY 27-00-00 Page 10
Jul 31/00
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 10
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27 - FLIGHT CONTROLS
27-90-00 FLY BY WIRE PHILOSOPHY
CONTENTS
General
Control Column
Mechanical Linkage
Autopilot Servo
Artificial Feel
Servo Actuator
Control Wheel Steering Function
TMUFCLC02 LEVEL 1
EFFECTIVITY 27-90-00 Page 1
Jun 30/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 11
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FLY BY WIRE PHILOSOPHY
GENERAL
All the flight control surfaces are now electrically
controlled and hydraulically operated. In addition,
the stabilizer and the rudder have an hydromechanical
control back-up in case of electrical failure.
The main advantage of this philosophy is an improvement
in redundancy, in handling qualities, in weight saving
and thus in performance.
CONTROL COLUMN
The control column has been replaced by the side stick.
MECHANICAL LINKAGE
The mechanical channel is replaced by electrical wiring
and computers. These computers control the
servo-actuators.
The computers elaborate the flight control laws,
including flight envelope protection, which optimize
the control of the aircraft.
AUTOPILOT SERVO
The autopilot commands are directly transmitted to the
computers.
ARTIFICIAL FEEL
The modulated artificial feel is replaced by the side
stick centering spring.
SERVO ACTUATOR
The mechanical feedback of the conventional
servoactuator is replaced by an electrical feedback
to the computers.
CONTROL WHEEL STEERING FUNCTION
The Control Wheel Steering (CWS) function is ensured
by the computers which use the aircraft response to
maintain the required attitude.
TMUFCLC02-T01 LEVEL 1
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Jun 30/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 12
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FLY BY WIRE PHILOSOPHY
TMUFCLC02-P01 LEVEL 1
EFFECTIVITY 27-90-00 Page 3
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 13
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THIS PAGE INTENTIONALLY LEFT BLANK
TMUFCLC02 LEVEL 1
EFFECTIVITY 27-90-00 Page 4
Jun 30/97
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 27 FLIGHT CONTROLS
UF94200
EFFECTIVITY Page 14
ALL
27 - FLIGHT CONTROLS
27-00-00 SYSTEM CONTROL AND INDICATING
CONTENTS:
Side Sticks
Speed Brake Lever
THS Mechanical Control
Rudder Pedals
Slat/Flap Control Lever
Rudder Trim
Flight Control Panels
ECAM Pages
TMUFCBB04 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
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