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(2) Do this task: Control Rod for Standby Rudder Power Control Unit Adjustment,
TASK 27-21-00-820-810-002.
SUBTASK 27-21-71-710-006-002
(3) Do this task: Rudder Travel Test, TASK 27-21-00-700-817-002.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-71
Config 2
Page 407
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-71-410-002-002
(4) Install these access panels:
Number Name/Location
324BL Vertical Fin, Trailing Edge Access
324DL Trailing Edge Access
------------------------- END OF TASK ---------------------------
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
POST SB 737-27-1253
27-21-71
Config 2
Page 408
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
RUDDER FEEL AND CENTERING UNIT - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the rudder feel and centering unit
(2) An installation of the rudder feel and centering unit.
TASK 27-21-82-000-801
2. Rudder Feel and Centering Unit Removal
(Figure 401, Figure 402)
A. References
Reference Title
27-21-00-800-802 Remove Pressure from the Rudder Hydraulic Systems A, B, and
Standby (P/B 201)
B. Tools/Equipment
NOTE: When more than one tool part number is listed under the same "Reference" number, the
tools shown are alternates to each other within the same airplane series. Tool part numbers
that are replaced or non-procurable are preceded by "Opt:", which stands for Optional.
Reference Description
SPL-1585 Kit - Rigging Pins, All Systems
(Part #: F70207-109, Supplier: 81205, A/P Effectivity: 737-600, -700,
-700C, -700ER, -700QC, -800, -900, -900ER, -BBJ)
C. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
324 Vertical Fin - Rear Spar To Trailing Edge
D. Access Panels
Number Name/Location
112A Forward Access Door
113AC Fwd Nose Wheel Well Upper Access Panel
114AC Fwd Nose Wheel Well Upper Access Panel
324BL Vertical Fin, Trailing Edge Access
324DL Trailing Edge Access
324DR Vertical Fin, Trailing Edge Access
E. Prepare for the Removal
SUBTASK 27-21-82-860-003
WARNING: MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING GEARS.
WITHOUT THE DOWNLOCK PINS, THE LANDING GEARS COULD RETRACT AND
CAUSE INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) Do this task: Remove Pressure from the Rudder Hydraulic Systems A, B, and Standby,
TASK 27-21-00-800-802.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-21-82
Page 401
Oct 10/2006
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-82-010-001
(2) Open this access panel:
Number Name/Location
112A Forward Access Door
SUBTASK 27-21-82-010-003
(3) Remove these access panels:
Number Name/Location
113AC Fwd Nose Wheel Well Upper Access Panel
114AC Fwd Nose Wheel Well Upper Access Panel
SUBTASK 27-21-82-010-005
(4) Remove this access panel:
Number Name/Location
324BL Vertical Fin, Trailing Edge Access
SUBTASK 27-21-82-010-006
(5) Remove this access panel:
Number Name/Location
324DR Vertical Fin, Trailing Edge Access
SUBTASK 27-21-82-010-002
(6) Remove this access panel:
Number Name/Location
324DL Trailing Edge Access
SUBTASK 27-21-82-480-001
(7) Install the rig pin R-3 or R-4 from the rig pin kit, SPL-1585 in the forward rig pin hole of the
captain’s or first officer’s rudder forward quadrants (Figure 401).
F. Rudder Feel and Centering Unit Removal
(Figure 402)
SUBTASK 27-21-82-020-001
(1) Remove the rudder feel and centering unit [7]:
(a) Remove the nut [27], washer [26], nut [25], washer [24], and bolt assembly [23] to
disconnect the feel and centering unit [7] from the rudder trim actuator [1].
(b) Remove the nut [33], nut [32], washer [31], washer [30], bushing [29], and bolt assembly [28]
to disconnect the feel and centering unit crank [8] from the feel output rod [9].
(c) Remove the nuts [6], washers [5], and bolts [4] which attach the upper bearing housing [2]
and plate [3] to the airplane structure.
(d) Hold the rudder feel and centering unit [7] and remove these parts from the support bracket
[18]:
1) Remove the nuts [22], washers [21], washers [20], and bolts [19].
　
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