EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH A GRAPHITE OR ALUMINUM ú

 27-21-12
 RUDDER  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 403Nov 15/98 

A 737-300/400/500MAINTENANCE MANUAL
 S 764-045
 (3)  
Use the milliohmmeter to make sure there is a maximum of 0.010 ohms between the rudder and the vertical fin.

 S 434-016

 (4)  
Tighten the bolts for the No. 2 hinge segment to 140 to 160
 pound-inches.

 S 434-017

 (5)  
Tighten the bolts for the No. 3, 6 and 7 hinge segments to 70 to 80 pound-inches.

 S 434-018

 (6)  
AIRPLANES WITH A RUDDER POSITION TRANSMITTER; Connect the control rod for the rudder position transmitter to the rudder.

 S 094-020

 (7)  
Remove the rudder sling.

 S 434-021

 (8)  
Install the rudder hinge segments at the No. 4 and 5 hinges. Do not tighten the bolts that attach them.

 S 434-022

 (9)  
Install and tighten the hinge bolts at the No. 4 and 5 hinges. Tighten the hinge bolts to 60 to 85 pound-inches (140 pound-inches maximum to align the cotter pin).

 S 434-023

 (10)
 Tighten the bolts for the No. 4 and 5 hinge segments to 70 to 80 pound-inches.

 S 414-024

 (11)
 Install the seals and the seal attachment plates on each side of the vertical fin.

 S 434-025

 (12)
 Install the trailing edge seal for the vertical fin at the location of the number 4 and 5 rudder hinges.

 H.
Do a Test of the Rudder

 S 034-026
 (1)  Disconnect the forward end of the power control unit for the rudder. Move the forward end right and forward to make sure the power control unit will not hit the rudder clevis.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH A GRAPHITE OR ALUMINUM ú

 27-21-12
 RUDDER  ú
 ú 01 ú BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.  Page 404Nov 15/98 

A
737-300/400/500MAINTENANCE MANUAL
 S 214-027
 (2)  Make sure there is clearance between the seals and the front of the rudder and the balance weights.
 NOTE: Do this with the rudder turned 5 to 8 degrees to the left and
____
 right side of the center position.

 S 214-028
 CAUTION:_______WHEN YOU MOVE THE RUDDER MANUALLY, USE A LOADING BLOCK. PUT THE FORCE ON THE LOADING BLOCK APPROXIMATELY 47 INCHES FROM THE RUDDER HINGE LINE BETWEEN RUDDER STATIONS 13.33 AND 31.65. DO NOT PUT A FORCE OF MORE THAN 50 POUNDS ON THE RUDDER. IF YOU PUT THE FORCE ON THE RUDDER INCORRECTLY, IT CAN CAUSE DAMAGE TO THE RUDDER.
 (3)  
Use a rudder loading block to slowly move the rudder, by hand, through its full travel. If the rudder does not move freely, correct the problem.

 S 224-029

 (4)  
Measure the maximum force necessary to move the rudder slowly from the center to its fully left position.

 S 224-030

 (5)  
Measure the maximum force necessary to move the rudder slowly from the center to its fully right position.

 S 224-031

 (6)  
If the force necessary to move the rudder is more than 25 pounds, the bearing friction is too much. Correct this before you continue with this procedure.

 S 224-032

 (7)  
Measure the travel of the rudder from the center to its fully left position.

 S 224-033

 (8)  
Measure the travel of the rudder from the center to its fully right position.

 S 224-034

 (9)  
The rudder must have a travel of 23.17 |30 inches left and right from the center.

 S 434-035

 (10)
 Install the power control unit for the rudder (Ref 27-21-91/401).

 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITH A GRAPHITE OR ALUMINUM ú
　
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