27-18-01
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A

747-400 
MAINTENANCE MANUAL 
SEE  A 
INBOARD 
AILERON 
POSITION 
INBOARD  TRANSMITTER 
AILERON 

CONTROL ROD
SEE D CRANK
A
BONDING JUMPER
B
INDEX MARKS OUTER RIG PIN HOLE
INNER RIG PIN HOLE
TRANSMITTER
RIG PIN
SLOT
BRACKET
CRANK
TRANSMITTER  SHAFT 
INBD  CLAMPING SCREWS  CLAMPING 
SCREW 

C
____LEFT AILERON POSITION TRANS-
NOTE: MITTERS SHOWN. RIGHT TRANS-MITTERS SIMILAR.
Aileron Position Transmitter Installation Figure 401
SEE B
OUTBOARD AILERON
SEE C
OUTBOARD AILERON POSITION TRANSMITTER
ELECTRICAL
CONNECTOR

THUMBNUT
D
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 27-18-01
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A
747-400
MAINTENANCE MANUAL

 S 864-013
 (2)  Do this task:  "Trailing Edge Flap Deactivation" (AMM 27-51-00/201).
 S 864-003
 (3)  Make sure that the ailerons are in the neutral position.
 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)  Open the access panel for applicable transmitter: 591CB, LO Transmitter 573CB, LI Transmitter 673CB, RI Transmitter 691CB, RO Transmitter
 S 034-007
 (7)  Disconnect electrical connector from the applicable position transmitter:
 DT489, LO Transmitter DT1670, LI Transmitter DT1671, RI Transmitter DT488, RO 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 bracket to the airplane structure.

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747-400 MAINTENANCE MANUAL
 (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.

 TASK 27-18-01-404-010
 3.  Aileron Position Transmitter Installation (Fig. 401)_________________________________________
 A.  Special Tools and Equipment
 (1)  
G12001-50 Kit (Rigging Pins) (Preferred) ~................................................................... | Pin | Designation | Length (inch) | Dia (inch) | Qty | ..................................................................... | -33 | A/S-1 | 2.0 | 0.309-0.311| 2 | 2.........….................….................…..............…......1
　
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