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737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-11-00
Page 531
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
TASK 27-11-00-820-804
5. Aileron Feel and Centering Unit Adjustment
(Figure 505)
A. General
(1) The aileron feel and centering unit is referred to as the "centering unit" in this task.
B. References
Reference Title
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
32-00-01-480-801 Landing Gear Downlock Pins Installation (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.
Reference Description
SPL-1670 Mount - Control Wheel Protractor
(Part #: F72790, Supplier: 81205, A/P Effectivity: 737-100, -200, -200C,
-300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900, -900ER,
-BBJ)
SPL-1674 Assembly - Adapter, Control Wheel, Torque and Force Test
(Part #: F72867-1, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
SPL-1680 Protractor - Assembly, Control Column
(Part #: 4MIT65B80307-1, Supplier: 81205, A/P Effectivity: 737-100,
-200, -200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800,
-900, -900ER, -BBJ)
(Part #: A27021-29, Supplier: 81205, A/P Effectivity: 737-100, -200,
-200C, -300, -400, -500, -600, -700, -700C, -700ER, -700QC, -800, -900,
-900ER, -BBJ)
STD-753 Scale - Push/Pull, 0-25 pound (0-11 kilogram) Capacity, 1/4 pound
(113 gram) Accuracy
D. Location Zones
Zone Area
133 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Left
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
211 Flight Compartment - Left
212 Flight Compartment - Right
E. Prepare for the Adjustment
SUBTASK 27-11-00-480-011
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) If the downlock pins are not installed on all the landing gears, do this task: Landing Gear
Downlock Pins Installation, TASK 32-00-01-480-801.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-11-00
Page 532
Oct 10/2007
D633A101-GUN
BOEING PROPRIETARY - Copyright#Unpublished Work - See title page for details
SUBTASK 27-11-00-860-026
WARNING: MAKE SURE ALL PERSONS AND EQUIPMENT ARE CLEAR OF THE FLIGHT CONTROL
SURFACES, THE THRUST REVERSERS, AND THE LANDING GEAR. THESE
COMPONENTS CAN MOVE SUDDENLY WHEN YOU SUPPLY HYDRAULIC POWER.
THIS CAN CAUSE INJURY TO PERSONS AND DAMAGE TO EQUIPMENT.
(2) Pressurize hydraulic systems A and B, do this task: Hydraulic System A or B Pressurization,
TASK 29-11-00-860-801.
SUBTASK 27-11-00-820-012
(3) Make sure the springs [63] on the feel and centering unit [61] are not loose.
(a) If the springs [63] are loose, tighten the nuts [65] on the eyebolts [66] until you see 4 to 5
threads beyond the nuts [65].
(b) Do not stretch the springs [63] from free length.
F. Aileron Feel and Centering Unit Adjustment
SUBTASK 27-11-00-860-027
(1) Shake the control wheels to make sure that the wheels are in the neutral position.
SUBTASK 27-11-00-710-001
(2) Do this task: Control Wheel Centering Check, TASK 27-11-00-700-804.
SUBTASK 27-11-00-970-001
(3) Measure the control wheel breakout force in the clockwise and counterclockwise directions:
(a) Install the adapter, SPL-1674 to the captain’s control wheel.
NOTE: If the adapter is not available, put a tangent force to the captain’s control wheel at
a 6.5 inch (165 millimeters) radius.
(b) Install the mount, SPL-1670 and the control column assembly protractor, SPL-1680 to the
first officer’s control wheel.
(c) Set the indicator on the control column assembly protractor, SPL-1680 to zero degrees.
(d) Turn the control wheel clockwise until the aileron starts to move.
1) Using a push/pull scale 0-25 pound (0-11 kilogram), STD-753. Make sure the force to
turn the control wheel is not more than 29.0 pound-inches (3.2 newton-meters) or 4.5
pounds (20.0 newtons).
(e) Release the control wheel.
(f) Turn the control wheel counterclockwise until the aileron starts to move.
　
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