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amber in case of low pressure of blue, green and yellow
hydraulic systems.
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ECAM PAGE PRESENTATION
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27 - FLIGHT CONTROLS
27-00-00 PITCH CONTROL NORMAL D/O
CONTENTS:
Side Stick
Elevator Aileron Computer (ELAC)
Spoiler Elevator Computer (SEC)
Flight Management Guidance Computer (FMGC)
Elevators
Trimmable Horizontal Stabilizer (THS)
Trim Wheels
Self Examination
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PITCH CONTROL NORMAL D/O
SIDE STICK
The side stick sends electrical orders to the Elevator
Aileron Computers and Spoiler Elevator Computers.
ELEVATOR AILERON COMPUTER (ELAC)
There are 2 ELACs. ELAC 2 normally controls the
elevators and trimmable horizontal stabilizer with
ELAC 1 as a back-up.
In case of ELAC 2 failure, ELAC 1 automatically takes
over.
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PITCH CONTROL NORMAL D/O
TMUFCT302-P01 LEVEL 3
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PITCH CONTROL NORMAL D/O
SPOILER ELEVATOR COMPUTER (SEC)
In case of dual ELAC failure, SEC 1 or 2 automatically
takes over pitch control.
FLIGHT MANAGEMENT and GUIDANCE COMPUTER (FMGC)
When the auto pilot is engaged, the Flight Management
and Guidance Computer sends auto pilot commands to the
ELACs.
ELEVATORS
Each elevator is powered by two actuators, one in
active mode, the other in damping mode with automatic
change over in case of failure.
Both actuators become active in case of large pitch
demands.
The green and yellow actuators are controlled by ELAC
2 and the blue actuators are controlled by ELAC 1.
TRIMMABLE HORIZONTAL STABILIZER (THS)
The trimmable horizontal stabilizer is positioned by
a screw actuator driven by two hydraulic motors which
are controlled by one of three electric motors.
One electrical trim motor is operative at a time and
the other 2 are in stand-by.
Motor 1 is controlled by ELAC 2, motor 2 by ELAC 1 or
SEC 1, motor 3 by SEC 2.
TRIM WHEELS
The Mechanical trim which has priority over the
electrical trim, is operated from the manual trim
wheels.
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PITCH CONTROL NORMAL D/O - SPOILER ELEVATOR COMPUTER
TMUFCT302-P02 LEVEL 3
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SELF EXAMINATION
The Elevator and the THS are normally controlled by
ELAC 2. What happens if ELAC 2 fails ?
A - Pitch control is automatically
transferred to ELAC 1.
B - Pitch control is automatically
transferred to SEC 1 and SEC 2.
C - Pitch control is lost.
TMUFCT302 LEVEL 3
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27 - FLIGHT CONTROLS
27-90-00 PITCH CONTROL ABNORMAL D/O
CONTENTS:
Alternate Law in Elevator and Aileron Computer (With
Protection)
Alternate Law in Elevator and Aileron Computer (Without
Protection)
　
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