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Pressure Removal, TASK 27-21-00-840-802.
------------------------- END OF TASK ---------------------------
TASK 27-21-00-820-808-001
4. Rudder Control Cables RA and RB Adjustment
(Figure 501, Figure 502)
A. General
(1) Use this task to adjust the rudder control cables RA and RB. This task includes steps to adjust
the rudder forward quadrant and rudder pedals.
(2) Before you do cable adjustment, permit a minimum of one hour at a constant ambient
temperature of±5 degrees F (± 2.8 degrees C) for the airframe temperature to become stable.
(a) The cable tension values will not be correct when there are temperature differences along
the cable run.
B. References
Reference Title
24-22-00-860-811 Supply Electrical Power (P/B 201)
27-09-17-860-801 Location of the Flight Control Cables Air Pressure Seals (P/B 201)
27-21-00-800-802 Remove Pressure from the Rudder Hydraulic Systems A, B, and
Standby (P/B 201)
27-21-00-840-802 Put the Rudder Systems A, B, and Standby Back to the Condition
Before the Pressure Removal (P/B 201)
C. 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.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
Page 511
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
Reference Description
COM-1554 Tensiometer - Cable (40-600 LB)
(Part #: ACM-600, Supplier: 13331, A/P Effectivity: 737-ALL)
(Part #: T60 1001-C9-1A, Supplier: 0N8U4, A/P Effectivity: 737-ALL)
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)
D. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
311 Area Aft of Pressure Bulkhead - Left
312 Area Aft of Pressure Bulkhead - Right
324 Vertical Fin - Rear Spar To Trailing Edge
E. Access Panels
Number Name/Location
112A Forward Access Door
113AW Forward Nose Wheel Well Panel
113BW Forward Nose Wheel Well Panel
114AW Forward Nose Wheel Well Panel
114BW Forward Nose Wheel Well Panel
311BL Stabilizer Trim Access Door
324AL Vertical Fin, Aft Fin Access Door
324CL Vertical Fin, Access
F. Prepare for the Adjustment
SUBTASK 27-21-00-860-074-001
(1) Make sure the rudder trim indicator is at the zero unit of trim.
SUBTASK 27-21-00-730-014-001
(2) Do this task: Rudder Pedal Adjustment and Limit Travel Test, TASK 27-21-00-700-813-001.
SUBTASK 27-21-00-860-075-001
(3) Do this task: Remove Pressure from the Rudder Hydraulic Systems A, B, and Standby,
TASK 27-21-00-800-802.
SUBTASK 27-21-00-860-076-001
(4) Do this task: Supply Electrical Power, TASK 24-22-00-860-811.
SUBTASK 27-21-00-860-077-001
(5) Make sure that this circuit breaker is closed:
F/O Electrical System Panel, P6-2
Row Col Number Name
D 19 C00787 FLIGHT CONTROL TRIM CONT RUD
SUBTASK 27-21-00-010-022-001
(6) Open these access doors:
Number Name/Location
112A Forward Access Door
311BL Stabilizer Trim Access Door
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN 001-005, 155-157, 201-999 PRE SB 737-27-1253 27-21-00
Config 1
Page 512
Jun 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
(Continued)
Number Name/Location
324CL Vertical Fin, Access
SUBTASK 27-21-00-010-023-001
(7) Open these access panels:
Number Name/Location
113AW Forward Nose Wheel Well Panel
113BW Forward Nose Wheel Well Panel
114AW Forward Nose Wheel Well Panel
114BW Forward Nose Wheel Well Panel
SUBTASK 27-21-00-480-018-001
(8) Use a 40 - 600 lb cable tensiometer, COM-1554 to get the tension measurement.
G. Rudder Control Cables RA and RB Adjustment
SUBTASK 27-21-00-820-008-001
(1) If you install new rudder control cables RA and RB, then do these steps to stretch the cables:
(a) Operate the rudder trim indicator until you can install the rig pin R-5 in the rudder feel and
centering unit easily.
(b) Adjust the turnbuckles in the cables RA and RB to get a tension of 300 ±20 lbf (1334 ±89 N)
each.
1) Make sure you can install the rig pin R-3 from the rig pin kit, SPL-1585 freely in the
　
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