27-68-01
 ALL  ú ú 01 Page 401 ú Jun 18/01
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A
747-400
MAINTENANCE MANUAL

A INNER RIG PIN HOLE 
SCREW CLAMPING SHAFT 
ASEE THUMBNUT  CONTROL ROD  ROD A BSEE CONTROL 
B 
50` 
CRANK  CRANK 
MARK INDEX  BRACKET 
BRACKET 

MOUNTING
OUTER RIG BRACKET
PIN HOLE
RIG PIN SLOT
BONDING JUMPER
TRANSMITTER BRACKET
TRANSMITTER CLAMPING SCREWS
A
40`
INDEX MARK
SPOILER NO. 4 SPOILER NO. 12A-A
Spoiler Position Transmitter Installation
Figure 401

ELECTRICAL CONNECTOR
INDEX
MARKS

SPOILER POSITION TRANSMITTER
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 27-68-01
 ALL  ú ú 01 Page 402 ú Jun 10/88
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A
747-400 MAINTENANCE MANUAL
 S 864-013
 (3)  
Do this task: "Trailing Edge Flap Deactivation" (AMM 27-51-00/201).

 S 864-004

 (4)  
Set all FLT CONTROL HYD POWER WING switches on the P461, Pilots' Overhead Maintenance Panel to SHUTOFF.

 (a)  
Make sure that the four VALVE CLOSED lights come on.

 S 864-005
 (5)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P180, DC Power Distribution Panel
 1) 180H7, LATERAL CONT VLV SYS 1
 2) 180E6, LATERAL CONT VLV SYS 2
 3) 180H22, LATERAL CONT VLV SYS 3
 4) 180E21, LATERAL CONT VLV SYS 4

 (b)  
P6, Main Power Distribution Panel
 1) 6J21, SPLR/ALRN IND
 2) 6J20, SPLR/ALRN SENSOR

 S 014-006
 (6)  
Get access to the applicable transmitter.

 S 034-007

 (7)  
Disconnect the electrical connector from the position transmitter: DT435 No. 4 Spoiler Transmitter DT436 No. 12 Spoiler Transmitter

 S 034-008

 (8)  
Disconnect the bonding jumper from the transmitter.

 S 024-009

 (9)  
Remove the transmitter assembly:

 (a)  
Remove the nut, washer, and screw that attach the control rod to the crank.

 (b)  
Remove two screws, washers, and nuts that attach the transmitter bracket to the bracket on the wing rear spar.

 (c)  
Remove the transmitter, the bracket, and the crank assembly from the airplane.

 S 034-027
 (10)
 Disassemble the transmitter assembly:

 (a)  
Remove the crank from the transmitter shaft.
 1) Remove the shaft clamping screw from the crank.
 2) Remove the crank.

 (b)  
Remove the transmitter from the bracket.
 1) Loosen the transmitter clamping screws.
 2) Remove the inner clamping screw.
 3) Remove the transmitter from the bracket.

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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A
747-400 MAINTENANCE MANUAL
 TASK 27-68-01-404-010
 3.  Spoiler Position Transmitter Installation (Fig. 401)_________________________________________
 A. Special Tools and Equipment
 (1)
M25093-4C rig pin or equivalent diameter rod (0.309-0.311)

 B.
Standard Tools and Equipment

 (1)  
Milliohmmeter - 0 to 0.1 ohms range

 C.
References

 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 27-51-00/201, Trailing Edge Flap System

 (3)  
AIPC 27-68-01, Fig. 1

 (4)  
SSM 27-68-01

 (5)  
WDM 27-68-11

 D.
Access

 (1)  
Location Zone
 582 No. 4 Spoiler
 685 No. 12 Spoiler

 E.
Install the Spoiler Position Transmitter
　
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