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actuated by the override mechanism, ensure that the computers remain synchronized
with the manually-selected position).
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-27-20-30 P 6/22
FCOM 19 AUG 10
The THS is manually-controlled on ground for the THS setting, before takeoff, and in flight,
when in direct law :
‐ Before takeoff, the pilot sets the THS to the angular value, determined as a function of the
aircraft CG, using the CG scale on the wheel. The relationship between the aircraft CG and
the THS setting on the trim wheel is only applicable for takeoff. The limits of the THS normal
setting range for takeoff are indicated by a green band on the pitch trim wheel
‐ In flight, when in direct law, the pilot uses the THS conventionally to fly in trim. In flight, the
aircraft pitch trim setting depends on the aircraft CG, weight, altitude and speed. As the
result, the relation between the aircraft CG, and the THS setting displayed on the pitch trim
wheel, does not apply in flight.
After nosewheel touchdown, when the pitch attitude becomes less than 2.5 ° for more than 5 s ,
and the ground spoilers are retracted, pitch trim is automatically reset to 4 ° up.
LATERAL CONSOLES
Applicable to: ALL
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-27-20-30 P 7/22
FCOM 19 AUG 10
(1) ARM REST
Arm rest is linked to the seat by means of a supporting arm.
The arm rest position is adjustable.
Following setting and indications are provided:
(A) Height adjustment
(B) Pitch adjustment
(C) Armrest memory position display in pitch and in height.
(2) SIDESTICKS
Sidesticks, one on each lateral console, are used for manual pitch and roll control. They are
springloaded to neutral. When the autopilot is engaged, a solenoid-operated detent locks both
sidesticks in the neutral position. If the pilot applies a force above a given threshold (5 daN in
pitch, 3.5 daN in roll), the autopilot disengages and the sidestick unlocks and the deflection is
sent as command to the computers. The hand grip includes 2 pushbuttons :
Autopilot disconnect/s ‐ idestick priority pushubtton
‐ Push-to-talk button
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-27-20-30 P 8/22
FCOM 19 AUG 10
Sidestick priority logic
‐ When only one pilot operates the sidestick, his demand is sent to the computers.
‐ When the other pilot operates his sidestick, in the same or opposite direction, both pilots
inputs are algebraically-added. The addition is limited to single-stick maximum deflection.
Note: In the event of simultaneous input on both sidesticks (2 °deflection of the neutral
position in any direction) the two green SIDE STICK PRIORITY lights, on the
glareshield, come on and the “DUAL INPUT” voice message activates.
A pilot can deactivate the other sidestick, and take full control by pressing and keeping
pressed his takeover pushbutton.
For latching the priority condition, it is recommended that the takeover pushbutton be
pressed for more than 40 s . The takeover pushbutton can then be released without losing
priority.
However a deactivated sidestick can be reactivated at any time, by momentarily pressing
either takeover pushbutton on either stick.
If both pilots press their takeover pushbuttons, the last pilot to press their pushbutton will
have priority.
Note: If an autopilot is engaged, any action on a takeover pushbutton will disengage it.
In a priority situation
A red light will come on, in front of ‐ the pilot whose stick is deactivated.
‐ A green light will come on, in front of the pilot who has taken control, if the other sidestick is
not in the neutral position (to indicate a potential and unwanted control demand).
Note: If one stick is deactivated on ground, at takeoff thrust application, the takeoff
«CONFIG» warning is triggered.
A330/A340 FLIGHT CREW
OPERATING MANUAL
AIRCRAFT SYSTEMS
FLIGHT CONTROLS
FLIGHT CONTROL SYSTEM - CONTROLS AND INDICATORS
A330/A340 FLEET DSC-27-20-30 P 9/22
FCOM 19 AUG 10
GLARESHIELD
Applicable to: ALL
(1) SIDE STICK PRIORITY lt
Arrow red lt : ‐ Illuminates in front of the pilot losing authority.
‐ Extinguishes if he has recovered his authority, ie:
• If the other take-over pushbutton is released prior priority condition
is latched, or
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A330/A340机组操作手册 FLIGHT CREW OPERATING MANUAL FCOM 2(148)
