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quadrant.
During aileron trim, the control wheels also move to supply an
indication on the top of the control wheel column.
AILERON AND AILERON TRIM CONTROL SYSTEM - GENERAL DESCRIPTION 1
EFFECTIVITY
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Autopilot Operation
When engaged, the flight control computers control the aileron
autopilot actuators. The actuators give mechanical input to the
feel and centering unit and aileron position sensor. Movement
of the feel and centering unit goes to the aileron PCU and signal
from the aileron position sensor go to the FCCs. The aileron
PCU movement moves the aileron through the wing cables and
the quadrant. The quadrant also gives mechanical input to the
aileron position transmitter. The transmitter sends position
signals to the (FDAU).
See the digital flight control system section for more information
on the aileron autopilot operation and aileron position sensor.
(SECTION 22-11)
See the digital flight recorder system section for more
information about the aileron position transmitter.
(SECTION 31-31)
Flight Spoilers
The flight spoilers also supply roll control. When the aileron
PCU moves, it supplies an input to the flight spoiler system.
See the flight spoiler control system section for more
information on the spoiler and speedbrake control.
(SECTION 27-61)
AILERON AND AILERON TRIM CONTROL SYSTEM - GENERAL DESCRIPTION 1
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AILERON AND AILERON TRIM CONTROL SYSTEM - GENERAL DESCRIPTION 1
EFFECTIVITY
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AILERON AND AILERON TRIM CONTROL SYSTEM - GENERAL DESCRIPTION 1
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
General
These are the components of the aileron control system:
* Aileron control wheels (2)
* Aileron control wheel drum
* ACBA and ACBB; bus drum cables
* AA and AB, left and right body cables
* ABSA and ABSB, left and right wing cables
* Aileron control quadrant
* Aileron feel and centering unit
* Aileron power control units (2)
* Aileron body quadrants (2)
* Ailerons and wing quadrants (2)
* Balance panels (8) and tabs (2)
* Aileron spring cartridge
* Aileron transfer mechanism and lost motion device.
Aileron Control Wheels
The aileron control wheels transmit pilot inputs to the aileron
trim control system. Forces from the captain control wheel go
through an input shaft to the aileron control wheel drum. Forces
from the first officer control wheel go through an input shaft to
the aileron bus drum and cables. Input forces from the first
officer go through the bus drum cables to the captain bus drum.
Aileron Control Wheel Drum
Control wheel input from the captain and first officer control
wheels goes through the aileron control wheel drum to the
aileron left body cables.
Control Cables
Bus drum cables ACBA and ACBB connect the left and right
control wheels together.
Left body cables AA and AB provide inputs from the control
wheels to the aileron control quadrant during normal operation.
Left and right wing cables ABSA and ABSB transmit force from
the body quadrant to the wing quadrant to move the ailerons.
Right body cables AA and AB provide follow-up to the transfer
mechanism and lost motion device.
Aileron Control Quadrant
The aileron control quadrant connects to the aileron input shaft.
The aileron control quadrant transmits force from the left body
cables through the aileron input shaft to the aileron feel and
centering unit and aileron power control units.
Aileron Feel and Centering Unit
The aileron feel and centering unit connects to the bottom of the
aileron input shaft. When the shaft moves, feel force is provided
by two springs in the feel and centering unit.
AILERON AND AILERON TRIM CONTROL SYSTEM - GENERAL DESCRIPTION 2
EFFECTIVITY
　
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