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BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
RUDDER CONTROL TORQUE TUBE - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the rudder control torque tube
(2) An installation of the rudder control torque tube.
B. The rudder control torque tube is referred to as the "torque tube" in this procedure.
TASK 27-21-71-000-802-002
2. Rudder Control Torque Tube Removal
(Figure 401)
A. References
Reference Title
27-21-00-800-802 Remove Pressure from the Rudder Hydraulic Systems A, B, and
Standby (P/B 201)
27-21-87-000-801 Rudder Trim Actuator Removal (P/B 401)
B. Location Zones
Zone Area
324 Vertical Fin - Rear Spar To Trailing Edge
C. Access Panels
Number Name/Location
324BL Vertical Fin, Trailing Edge Access
324DL Trailing Edge Access
D. Prepare for the Removal
SUBTASK 27-21-71-860-003-002
(1) Do this task: Remove Pressure from the Rudder Hydraulic Systems A, B, and Standby,
TASK 27-21-00-800-802.
SUBTASK 27-21-71-010-002-002
(2) Remove these access panels:
Number Name/Location
324BL Vertical Fin, Trailing Edge Access
324DL Trailing Edge Access
E. Torque Tube Removal
(Figure 401)
SUBTASK 27-21-71-020-010-002
(1) Remove the nut [33], washer [32], washer [31], and bolt assembly [30] to disconnect the standby
rudder PCU control rod [2] from the upper crank [34].
SUBTASK 27-21-71-020-011-002
(2) Remove the nuts [33], washers [32], washers [31], and bolt assemblies [30] to disconnect the
main rudder PCU control rods [3] from the center cranks [29].
SUBTASK 27-21-71-020-012-002
(3) Remove the nut [11], washer [10], and bolt [9] to disconnect the aft quadrant control rod [12] from
the lower crank [20].
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 401
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-21-71-020-013-002
(4) Remove the nut [7], nut [6], washer [5], and bolt assembly [4] to disconnect the control rod [8]
from the lower crank [20].
SUBTASK 27-21-71-020-014-002
(5) Remove the rudder trim actuator [18], do this task: Rudder Trim Actuator Removal,
TASK 27-21-87-000-801
SUBTASK 27-21-71-020-015-002
(6) Remove the torque tube [1]:
(a) Use a marker or pen to make marks to identify the installed positions of the center cranks
[29], and upper crank [34].
(b) Remove the nuts [27], washers [26], washers [25], bolt [24], and bolt [28] that attach the
upper crank [34] to the torque tube [1].
(c) Remove the nuts [27], washers [26], washers [25], bolts [24], and bolts [28] that attach the
center cranks [29] to the torque tube [1].
(d) Remove the nuts [39], washers [38], and bolts [37] that attach the lower bearing housing
[21] to airplane structure.
NOTE: Do not remove the lower crank [22] from the torque tube [1].
(e) Pull the torque tube [1] down through the upper bearing housing [35], upper crank [34], and
center cranks [29].
(f) Remove the torque tube [1], upper crank [34], and center cranks [29] from the airplane.
------------------------- 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 402
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Rudder Control Torque Tube Installation
Figure 401 (Sheet 1 of 3)/27-21-71-990-803-002
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 403
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Rudder Control Torque Tube Installation
Figure 401 (Sheet 2 of 3)/27-21-71-990-803-002
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 404
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Rudder Control Torque Tube Installation
Figure 401 (Sheet 3 of 3)/27-21-71-990-803-002
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 006-099, 101-122; GUN 001-005, 155-157, 201-999
　
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