SEE A FIRST OFFICER'S CONTROL COLUMN
FIRST OFFICER'S
SEE D RUDDER PEDALS
SEE C RUDDER PEDAL POSITION TRANSMITTER
SEE B
FWD
A
COLUMN/RUDDER PEDAL POSITION DIGITIZER CONTROL LEVER SPEED BRAKE CONTROL STAND PILOTS'
SPEED BRAKE TRANSMITTER LEVER POSITION MECHANISM DRUM SPEED BRAKE
ELECTRICAL SYSTEMS CARD FILE
B
C
Figure 1 (Sheet 1) Control Wheel, Control Column, Rudder Pedal, and Speed Brake Lever Position Indication - Component Location
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A
747-400
MAINTENANCE MANUAL
CONTROL COLUMN CAPTAIN'S
CAPTAIN'S CONTROL WHEEL
CONTROL WHEEL POSITION TRANSMITTER
SEE E AILERON DRUM
FWD D TORQUE TUBE ELEVATOR POSITION TRANSMITTER CONTROL COLUMN NEGATOR SPRING 1E FWD BUS DRUM
MOUNTING
ELECTRICAL BRACKET
CONNECTOR,D18966P
WIRE CLAMP
CONTROL WHEEL POSITION
1 TRANSMITTER WITH NEGATOR
TRANSMITTER
SPRING DESIGN
2 TRANSMITTER WITH DIRECT
E2
DRIVE DESIGN
Control Wheel, Control Column, Rudder Pedal, and Speed Brake
Lever Position Indication - Component Location
Figure 1 (Sheet 2)
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747-400
MAINTENANCE MANUAL
5. Column/Rudder Pedal Position Digitizer (Fig. 1)
______________________________________
A. The column/rudder pedal position digitizer card receives the signals from the control wheel, control column, and rudder pedal position transmitters. The digitizer card converts the signals to a serial digital format for transmission to the EIU's on an ARINC 429 bus. The card is located in the electrical systems card file in the main equipment center on the left side of the nose gear wheel well.
6. Speed Brake Lever Position Transmitter (Fig. 1)
______________________________________
A. The speed brake lever position transmitter is located under the pilots' control stand forward of the speed brake drum mechanism. The transmitter contains three rotary variable differential transformers (RVDT) which are driven by the same input shaft. Movement of the speed brake control lever is transferred to the position transmitter shaft through a crank and a control rod attached to the speed brake drum mechanism. The control rod is adjusted to allow a rig pin to be inserted through the transmitter housing and the crank.
7. Operation (Figs. 2 and 3)
_________
WHEEL
10.5
PEDAL 12.3
COLUMN 10.0
FLIGHT CONTROLS
MAINTENANCE PAGE
AUXILIARY EICAS DISPLAY
Control Column, Rudder Pedal, and Control Wheel
Position Indication EICAS Displays
Figure 2
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747-400
MAINTENANCE MANUAL
M7353 LEFT EIU
M7352 CENTER EIU
M7351
RIGHT EIU
LEVER POSITION TRANSMITTER
Control Wheel, Control Column, Rudder Pedal, and Speed Brake
Lever Position Indication Schematic
Figure 3
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