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A
737-300/400/500MAINTENANCE MANUAL
 RUDDER AFT QUADRANT - INSPECTION/CHECK
______________________________________
 1.  General_______
 A. This procedure has these tasks:
 (1)  
Rudder Aft Quadrant Wear Limit Check

 (2)  
Rudder Aft Quadrant Visual Inspection

 TASK 27-21-61-226-006
 2.  Rudder Aft Quadrant Wear Limits (Fig. 601)_______________________________
 A. Standard Tools and Equipment
 (1)  
Micrometer

 (2)  
Vernier Caliper

 B.
References

 (1)  
27-21-61/401, Rudder Aft Quadrant

 C.
Access

 (1)  
Location Zones
 706 Vertical Fin

 (2)  
Access Panels
 9525L Access Door on Fin
 9530L Access Door on Fin

 D.
Procedure

 S 026-001
 (1)
Remove the rudder aft quadrant (AMM 27-21-61/401).

 (2)  
Measure the parts of the rudder aft quadrant for worn areas.

 S 226-003

 (3)  
Compare the dimensions that you measured with the permitted dimensions shown in Figure 601.

 (4)  
Replace the parts that are not in the tolerance.

 S 226-002
 S 436-004
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A 737-300/400/500MAINTENANCE MANUAL
AFT QUADRANT
NUT (ON RIGHT
SEE A END ONLY)
1. BEARING/SHAFT  (BOTH ENDS)
A-A
STRUCTURE
BEARING
HOUSING

INPUT CRANK CABLE RETAINER
AA B
INPUT ROD
B
AFT QUADRANT
CABLE RA
QUADRANT SHAFT
CABLE RB
FWD
AFT QUADRANT A
Rudder Aft Quadrant Wear Limits Figure 601 (Sheet 1)
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A 737-300/400/500MAINTENANCE MANUAL
INDEX NO. PART NAME  DIM.  DESIGN LIMITS  WEAR LIMITS  REPLACE PART WORN  REPAIR WORN PART  REPAIR INSTR. 
DIAMETER  WEAR DIM. MITTED PER- CLEAR-ANCE MAX DIA 
MIN  MAX 
1 3 2  BEARING ID  0.999  1.000  1.003  0.004 0.0035 0.0040  X 
SHAFTQUADRANT  OD ID  0.9980.2495  0.999 0.2505  0.997 0.2535  X  X  1 
BEARING BOLT  ID OD  0.2497 0.2485  0.2500 0.2495  0.2530 0.2481  X X 
BOLT  OD  0.2485  0.2495  0.2481  X 

USE A NAS537B4P OR EQUIVALENT BUSHING. DRILL THE HOLE IN THE QUADRANT TO MAKE A 0.0010 TO 0.0000 INCH INTERFERENCE FIT WITH THE BUSHING. THE MAXIMUM SIZE HOLE IN THE QUADRANT IS 0.3754 INCH. REAM THE BUSHING TO A 0.2495-0.2505 INCH DIAMETER.
3. BEARING/BOLT

Rudder Aft Quadrant Wear Limits
Figure 601 (Sheet 2)

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A 737-300/400/500MAINTENANCE MANUAL

QUADRANT
AFT RUDDER QUADRANT

Aft Rudder Quadrant Visual Inspection
Figure 602

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