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A
747-400
MAINTENANCE MANUAL

SEE A
A 
AFT QUADRANT A 
2. QUADRANT (CLEVIS/BOLT)  A 
1. QUADRANT/BEARING  3.  QUADRANT/BEARING 

4. BEARING/BOLT
A-A
Rudder Aft Quadrant Wear Limits Figure 601 (Sheet 1)
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INDEX NO.  PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  WORN PART REPLACE  PART WORN REPAIR  INSTR. REPAIR 
DIAMETER  MITTED PER-WEAR DIM.  MAX ANCE CLEAR-DIAM 
MIN  MAX 
1  QUADRANT  ID  0.8738  0.8743  0.8750  0  1 
BEARING  OD  0.8745  0.8750  0.8740  X 
2  QUADRANT (CLEVIS)  ID  0.2500  0.2540  0.2545  0.0060  2 
BOLT  OD  0.2485  0.2495  0.2480  X 
3  QUADRANT  ID  0.8748  0.8753  0.8770  0.0020  1 
BEARING  OD  0.8745  0.8750  0.8730  X 
4  BEARING  ID  0.3745  0.3750  0.3755  0.0020  X 
BOLT  OD  0.3735  0.3745  0.3730  X 

SHRINK FIT BUSHING
PRESS FIT BUSHING

Rudder Aft Quadrant Wear Limits
Figure 601 (Sheet 2)

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 AILERON AND RUDDER TRIM CONTROL MODULE -
______________________________________ MAINTENANCE PRACTICES
_____________________
 1.  General_______
 A.  There are three tasks in this procedure. The first task is the removal of the trim control module for the aileron and the rudder. The second task is the installation of trim control module for the aileron and the rudder. The third task is to clean the rudder trim switch.
 TASK 27-21-09-002-001
 2.  Aileron and Rudder Trim Control Module - Removal (Fig. 201)________________________________________________
 A.  References
 (1)  
AMM 24-22-00/201, Manual Control

 B.  
Access

 (1)  
Location Zones
 221/222 Control Cabin

 C.  
Prepare for the Removal

 S 862-002
 (1)  
Supply electrical power (AMM 24-22-00/201).

 S 862-003

 (2)  
Put the FLT CONTROL HYD POWER - TAIL switches No. 1, 2, 3 and 4 on the overhead panel to the SHUTOFF position and attach DO-NOT-OPERATE tags.

 S 862-004

 (3)  
Open these circuit breakers and attach DO-NOT-CLOSE tags:

 (a)  
P7, Overhead Circuit Breaker Panel
 1) 7D16, RUD TRIM CONT
 2) 7D17, AILERON TRIM

 D.  
Procedure

 S 022-005
 (1)  
Remove the aileron and rudder trim control module:

 (a)  
Turn the four fasteners that connect the trim module to the aft electronic control panel, P8.

 (b)  
Lift the trim module from the P8 panel.

 (c)  
Disconnect the two electrical connectors from the trim module.

 (d)  
Remove the trim module from the P8 panel.

 TASK 27-21-09-402-023
 3.  Aileron and Rudder Trim Control Module - Installation (Fig. 201)
_____________________________________________________
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 27-21-09
　
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