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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-034
DFCS - CONTROL WHEEL STEERING FORCE TRANSDUCER
DFCS - CONTROL WHEEL STEERING FORCE TRANSDUCER
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-034
Roll CWS Force Transducer Component Locations
You attach one end of the roll CWS force transducer to the bus
drum assembly. You attach the other end to the control drum
assembly.
Roll CWS Force Transducer Operation
When the autopilot is disengaged and the pilot turns the control
wheel, the bus drum turns. This causes the right arm that is
attached to the force transducer to turn. The force transducer is
very rigid so it turns the left arm which causes the control drum
to turn. This moves the aileron cables to the aileron input torque
tube and causes the ailerons to move.
When the autopilot is engaged, the aileron A/P actuator is
pressurized and the actuator holds the aileron input torque tube
so it cannot move. This does not let the control drum turn so the
left arm that is attached to the force transducer cannot move.
When the pilot turns the control wheel, the right arm attached to
the force transducer compresses or expands the force
transducer. The shim clearance area allows the movement of
the right arm. This provides the electrical signal to the FCCs.
The FCCs send a command to the aileron A/P actuator to move
the input torque tube and then the ailerons.
If the force transducer breaks, the tab on the right arm contacts
the gap edge of the left arm and the bus drum rotation turns the
control drum.
Training Information Point
When you make an adjustment to the roll CWS force transducer,
you put shims between the shaft and the drum in the shim
clearance area. After the adjustment, make sure you remove
the shims.
DFCS - ROLL CWS FORCE TRANSDUCER - LOCATION
EFFECTIVITY
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Page 98
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-035
DFCS - ROLL CWS FORCE TRANSDUCER - LOCATION
DFCS - ROLL CWS FORCE TRANSDUCER - LOCATION
EFFECTIVITY
SHZ ALL 22-11-00
Page 98.1
D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
22-11-00-035
Pitch CWS Force Transducers Locations
There are two pitch CWS force transducers. One transducer is
on the control quadrant at the lower end of the captain control
column. The other one is on the control quadrant at the lower
end of the first officer control column.
Pitch CWS Force Transducer Operation
When the autopilot is disengaged and the pilot moves the
control column, the support quadrant turns. This causes the left
arm of the support quadrant that is attached to the force
transducer to move. The force transducer is very rigid so it
moves which causes the forward quadrant to turn. This moves
the elevator cables to the elevator input torque tube and causes
the elevator to move.
When the autopilot is engaged, the elevator A/P actuator is
pressurized and the actuator holds the elevator input torque
tube so it cannot move. This does not let the forward quadrant
move so the right attachment to the force transducer cannot
move. When the pilot moves the control column, the left support
quadrant arm attached to the force transducer compresses or
expands the force transducer. The shoulder bolt allows the
movement of the left arm. This provides the electrical signal to
the FCCs. The FCCs send a command to the elevator A/P
actuator to move the input torque tube and then the elevator.
If the force transducer breaks, the support quadrant contacts the
center of the shoulder bolts and the forward quadrant turns to
move the elevator control cables.
Training Information Point
When you make an adjustment to the pitch CWS force
transducer, you replace the shoulder bolts with regular bolts.
After the adjustment, make sure you remove the regular bolts
and put the shoulder bolts back.
DFCS - PITCH CWS FORCE TRANSDUCER - LOCATIONS
EFFECTIVITY
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D633A101-SHZ1 Jun 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
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