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PCU (SeeFigure 27-21-91-990-806-001).
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999 POST SB 737-27-1253
(d) Install the control rod (or rods) that you removed between the torque tube and the main
PCU (SeeFigure 27-21-91-990-804-002).
GUN ALL
SUBTASK 27-21-11-220-005
(12) Make sure the mismatch between the rudder and the vertical fin is correct at each of rib
locations (Figure 402) (View B-B).
SUBTASK 27-21-11-820-001
(13) Adjust the seals at the trailing edge of the vertical fin and tighten them (Figure 402) (View J and
C-C).
SUBTASK 27-21-11-820-002
(14) Adjust the balance weight seals on the vertical fin and tighten the seal retainers (Figure 402)
(View I and A-A).
SUBTASK 27-21-11-820-003
(15) Adjust the clearance for the lower (rudder to body) seal (Figure 402) (View K, D-D, and E-E):
(a) Move the rudder to its neutral position.
(b) Make sure the gap is 0.00 in. (0.00 mm) -- -0.04 in. (-1.02 mm).
(c) If it is necessary, do these steps to adjust the seal:
1) Loosen the bolts [48] and bolts [49] from the seal.
2) Adjust the seal until the gap is 0.00 in. (0.00 mm) -- -0.04 in. (-1.02 mm).
3) Tighten the bolts [48] and bolts [49].
(d) Make sure the seal does not cause a blockage at the left and right rudder drain holes.
SUBTASK 27-21-11-860-004
(16) Remove the safety tags and close these circuit breakers:
F/O Electrical System Panel, P6-2
Row Col Number Name
D 16 C00788 FLIGHT CONTROL TRIM IND RUD
D 19 C00787 FLIGHT CONTROL TRIM CONT RUD
SUBTASK 27-21-11-220-006
(17) Do this task: Rudder Hinge Bearing and PCU Bearing Freeplay, TASK 27-21-00-700-814-001
or Rudder Hinge Bearing and PCU Bearing Freeplay, TASK 27-21-00-700-814-002.
SUBTASK 27-21-11-220-007
(18) Do this task: Rudder Travel Test, TASK 27-21-00-700-817-001 or Rudder Travel Test,
TASK 27-21-00-700-817-002.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-21-11
Page 417
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SUBTASK 27-21-11-220-008
(19) Do this task: Rudder Centering Test, TASK 27-21-00-700-815-001 or Rudder Centering Test,
TASK 27-21-00-700-815-002
SUBTASK 27-21-11-220-009
(20) Do this task: Rudder Hinge Friction Test, TASK 27-21-00-700-823-001 or Rudder Hinge
Friction Test, TASK 27-21-00-700-821-002
G. Put the Airplane Back to Its Usual Condition
SUBTASK 27-21-11-410-001
(1) Install these access panels:
(a) Hinge Covers
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-21-11
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D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
RUDDER INDEX PLATE - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the rudder index plate
(2) An installation of the rudder index plate.
TASK 27-21-17-000-801
2. Rudder Index Plate Removal
(Figure 401)
A. Location Zones
Zone Area
315 APU Compartment - Left
316 APU Compartment - Right
B. Rudder Index Plate Removal
SUBTASK 27-21-17-930-001
(1) Put a tape on the airplane adjacent to the rudder index plate.
(a) Accurately make a mark of the position of the rudder index plate on the tape.
SUBTASK 27-21-17-020-001
(2) Remove the screws [2] and washers [3] to remove the rudder index plate [1].
SUBTASK 27-21-17-020-002
(3) Remove the rudder index plate [1] from the airplane.
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
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Rudder Index Plate Installation
Figure 401/27-21-17-990-801
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-21-17
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Oct 10/2003
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TASK 27-21-17-400-801
3. Rudder Index Plate Installation
(Figure 401)
A. Location Zones
Zone Area
315 APU Compartment - Left
316 APU Compartment - Right
B. Rudder Index Plate Installation
SUBTASK 27-21-17-420-001
(1) If there is tape with a mark that shows the correct position, then do these steps to install the
rudder index plate [1]:
(a) Place the rudder index plate [1] in its position and align it with the mark.
(b) Install the screws [2] and washers [3] to install the rudder index plate [1].
　
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