747-400 AMM 飞机维护手册 飞行操纵 FLIGHT CONTROLS 3(3)

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 (4)  S 864-005Set the rudder trim in the neutral position.
 (5)  S 864-006Open these circuit breakers and attach DO-NOT-CLOSE tags: (a) P7, Overhead Circuit Breaker Panel 1) 7D16, RUD TRIM CONT
 (6)  S 014-007Open the access panel, 324FL.
 (7)  S 494-008Install rig pin R-4 into the input crank of the rudder feel and centering mechanism.
 (8)  S 034-009Disconnect these electrical connectors from the applicable position transmitter: (a) DT490 Upper Rudder Transmitter (b) DT491 Lower Rudder Transmitter
 (9)  S 034-010Disconnect the bonding jumper from the transmitter.
 S 024-011

 (10)
 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.

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

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 27-28-01
 ALL  ú ú 03 Page 403 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 034-030
 (11)
 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 27-28-01-404-012
 3.  Rudder Position Transmitter Installation (Fig. 401)________________________________________
 A. Special Tools and Equipment
 (1)  
G12001-50, Rig Pin Kit

 (2)  
MS20392-4C Rig Pin or equivalent diameter rod (0.309-0-311 inch)

 B.
References

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

 (2)  
AIPC 27-28-01 Fig. 1

 (3)  
SSM 27-28-01

 (4)  
WDM 27-28-11

 C.
Access

 (1)  
Location Zone 324 Vertical Stabilizer Rear Spar to Trailing Edge

 (2)  
Access Panel 324FL Rudder Components Inspection Access Panel

 D.
Install the Rudder Position Transmitter

 S 434-013
 (1)  
Assemble the transmitter assembly:

 (a)  
Put the transmitter into the bracket until the inner clamping screw can engage the circumferential groove on the transmitter. 1) Install the transmitter clamping screws.

 a) Do not tighten the screw.

 (b)  
Turn the transmitter until E|Z (electrical zero) index mark on transmitter housing is aligned with the centerline of the bracket rig pin holes.

 (c)  
Lightly tighten the transmitter clamping screws.

 (d)  
Put the transmitter shaft into the crank until the shaft clamping screw can engage circumferential groove on the shaft.

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 27-28-01
 ALL  ú ú 03 Page 404 ú Feb 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 (e)  
Install the shaft clamping screw, washer, and nut. 1) Do not tighten the nut.

 (f)  
Align the index mark on the end of the shaft with the centerline of the rig pin slot in the crank.

 (g)  
Tighten the shaft clamping screw to 5-10 pound-inches.

 S 424-014
 (2)  
Install the transmitter assembly:

 (a)  
Set the transmitter, the bracket, and the crank assembly on the airplane. 1) Install two screws, washers, and nuts that attach the

 bracket to the airplane structure a) Tighten the nuts to 20-30 pound-inches.
 2)  Install the screw, washer, and nut to attach the control rod to the crank. a) Tighten the nut to 5-10 pound-inches.
 S 434-014
 (3)  
Install the bonding jumper.

 S 434-015
　
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