SPEED BRAKE  PILOTS' 
CONTROL LEVER  CONTROL 
SEE  A  STAND 

A 
A 
SEE  B 
A 
AND NUTS SCREWS, WASHERS ASSEMBLY MOUNTING  3/16 INCH  JAM NUT CRANK  CONTROL ROD 
(4 LOCATIONS) RIG PIN SLOT 
ELECTRICAL 
CONNECTORS 
TRANSMITTER 
ASSEMBLY 

INBD
MOUNTING B BRACKET B FWD A-A
Speed Brake Lever Position Transmitter Installation Figure 401 (Sheet 1)
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A

747-400
MAINTENANCE MANUAL

TRANSMITTER  B  B 
CRANK  CONTROL ROD 
CRANK  B 

3/16 INCH RIG PIN HOLE
SCREWS, MOUNTING AND NUTS WASHERS, ASSEMBLY (4 LOCATIONS) WASHER, NUT SCREW,  CONTROL ROD 
B-B 

Speed Brake Lever Position Transmitter Installation
Figure 401 (Sheet 2)

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747-400 MAINTENANCE MANUAL
 TASK 27-08-06-404-004
 3.  Speed Brake Lever Position Transmitter Assembly Installation (Fig. 401)____________________________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 25-22-01/401, Main Passenger Compartment Ceiling Access Panels

 (3)  
AIPC 27-62-55, Fig. 1

 (4)  
SSM 22-10-02, SSM 22-10-03, SSM 22-10-04

 (5)  
WDM 22-11-11, WDM 22-11-21, WDM 22-11-31

 B.
Access

 (1)  
Location Zone 211 Passenger Cabin - Nose to First Door, LH

 C.
Install the Transmitter Assembly

 S 424-005
 (1)  
Install the transmitter assembly:

 (a)  
Put the transmitter assembly on the mounting bracket with the shaft points down.

 (b)  
Install the four screws, washers, and nuts that attach the transmitter assembly to the mounting bracket.

 (c)  
Connect the crank to the control rod with the screw, washer, and nut.

 (d)  
Connect the electrical connectors DB7978A, DB7978B, and DB7978C.

 S 864-011
 (2)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7D8, FLT CONT CMPTR L PWR
 2) 7D13, FLT CONT CMPTR C PWR
 3) 7D15, FLT CONT CMPTR R PWR

 D.
Adjust the Transmitter Assembly

 S 824-006
 (1)  
Adjust the transmitter assembly:

 (a)  
Move the speed brake lever forward to the DN detent.

 (b)  
Install the rig pin through the hole in the crank and the slot on the transmitter assembly. 1) If you cannot install the rig pin easily, adjust the

 control rod until you can install the rig pin correctly. 2) Tighten the jam nut on the control rod.
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747-400 MAINTENANCE MANUAL
 E. Do a Ground Test of the Transmitter Assembly
 S 864-012
 (1)
Do this task: "Supply Electrical Power" (AMM 24-22-00/201).

 S 744-007

 (2)  
Do the ground test of the transmitter assembly:

 (a)  
Push the key for <22 AUTOPILOT FLT DIR from the GROUND TESTS menu.
　
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