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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-61-00-006
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-61-00-006
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FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER
27-61-00
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D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
Physical Description
These are the components of the spoiler mixer:
* Aileron cam
* Centering cam
* Rollers (2)
* Output levers (2)
* Links and bellcranks.
These are the components of the spoiler ratio changer:
* Ratio changer input rod
* Bellcrank
* Lever
* Speedbrake input quadrant
* Spoiler output quadrants (2).
The ratio changer input rod connects to the spoiler control
quadrant shaft. This rod connects to a bellcrank that has two
rollers in a slot. The rollers connect to a lever and a link. The
lever turns the aileron cam. Rollers move on the aileron cam.
Movement of these rollers causes the output levers to turn.
These levers move links and bellcranks to turn the spoiler
output quadrants.
If the aileron input to the spoiler mixer disconnects, input from
the centering cam moves the aileron cam to the neutral
position. This makes the flight spoilers move to the down
position.
A no-back brake attaches to the speedbrake input quadrant. The
no-back brake prevents movement of the quadrant if the
speedbrake lever cables break.
Control Wheel Operation
Commands from the control wheel go through the spoiler
control quadrant shaft to the ratio changer input rod.
When the control wheel turns to roll left, the spoilers on the left
wing move up. The control wheel commands cause the spoiler
control quadrant shaft to turn clockwise. This causes the ratio
changer input rod to move to the right. This rod turns the
bellcrank and moves the lever down. The lever turns the aileron
cam clockwise. As the cam turns, the right roller moves and
causes the right output lever to turn clockwise a small amount.
This keeps the right spoilers down.
The aileron cam moves the left roller, which causes the left
output lever to turn clockwise. This turns the left spoiler output
quadrant clockwise and the left flight spoilers move up.
Speedbrake Lever Operation
Commands from the speedbrake lever go to the speedbrake
input quadrant.
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-61-00-007
When the speedbrake lever moves up, the speedbrake input
quadrant turns counter-clockwise. This causes the output levers
to turn and the spoiler output quadrants turn in the up direction.
This causes the flight spoilers on both wings to move up.
Control Wheel and Speedbrake Lever Operation
When the speedbrake lever moves up, the amount of roll control
for the flight spoilers decreases. This occurs because the
speedbrake input quadrant causes the linkage to move. The
linkage moves the rollers in the slot of the bellcrank. These
rollers move in the direction of the bellcrank pivot. This
decreases the amount of movement of the lever when the
bellcrank turns. The bellcrank turns when the control wheels
turn.
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
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Page 20
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-61-00-007
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER - FUNCTIONAL DESCRIPTION
FLIGHT SPOILER CONTROL SYSTEM - SPOILER MIXER AND RATIO CHANGER - FUNCTIONAL DESCRIPTION
EFFECTIVITY
GUN ALL 27-61-00
Page 21
D633A101-GUN Feb 10/2006
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
27-61-00-007
Purpose
The spoiler actuator quadrants receive mechanical inputs from
the spoiler output quadrants on the spoiler ratio changer. The
　
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