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COM-6251 Wrench - Crowfoot
(Part #: SCO36, Supplier: 55719, A/P Effectivity: 737-300, -400, -500,
-600, -700, -700C, -700ER, -700QC, -800, -900, -900ER, -BBJ)
C. 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
D. Spoiler Mixer No-Back Assembly Test
SUBTASK 27-61-00-020-015
(1) Do this task: Spoiler Mixer Removal, TASK 27-61-21-000-801.
SUBTASK 27-61-00-860-074
(2) Disconnect the speed brake control cables SBA and SBB from the ratio changer:
(a) Install the cable clamps at the pressure seals in the main landing gear wheel well to keep a
small tension of the speed brake control cables SBA and SBB.
(b) Remove the lock clips from the turnbuckles in the lower nose compartment.
(c) Release the tension in the speed brake control cables SBA and SBB.
NOTE: Do not disconnect the turnbuckles.
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(d) Attach a tag to the speed brake control cables SBA and SBB for identification during the
installation.
(e) Remove the speed brake control cables SBA and SBB from the ratio changer.
SUBTASK 27-61-00-480-022
(3) Install a crowfoot wrench, COM-6251 on the coupling [91] of the no-back output shaft on the ratio
changer.
SUBTASK 27-61-00-700-018
(4) Apply a torque of 120 +/-10 pound-inches (13.6 +/-1.1 newton-meters) clockwise to the crowfoot
wrench, COM-6251.
NOTE: For accurate torque measurement, the axis of the torque wrench should be 90 degrees
from the axis of the crowfoot wrench.
(a) Make sure the speed brake input quadrant moves less than 2 degrees (0.125 inch (3.18
millimeters) at the radius of the cable groove on the input quadrant).
SUBTASK 27-61-00-700-019
(5) Apply a torque of 120 +/-10 pound-inches (13.6 +/-1.1 newton-meters) counterclockwise to the
crowfoot wrench, COM-6251.
NOTE: For accurate torque measurement, the axis of the torque wrench should be 90 degrees
from the axis of the crowfoot wrench.
(a) Make sure the speed brake input quadrant moves less than 2 degrees (0.125 inch (3.18
millimeters) at the radius of the cable groove on the input quadrant).
SUBTASK 27-61-00-020-026
(6) If the no-back output shaft on the spoiler ratio changer is not in the specified limits (of movement
less than 2 degrees in the clockwise and counterclockwise directions), then replace the ratio
changer. Do this task: Spoiler Ratio Changer Installation, TASK 27-61-31-400-801.
SUBTASK 27-61-00-420-004
(7) Attach the speed brake cables SBA and SBB to the ratio changer.
SUBTASK 27-61-00-420-005
(8) Do this task: Spoiler Mixer Installation, TASK 27-61-21-400-801.
NOTE: It is not necessary to adjust the output cam of the spoiler mixer at this time.
SUBTASK 27-61-00-420-007
(9) Do this task: Speed Brake Control Cable Adjustment, TASK 27-62-00-820-802.
SUBTASK 27-61-00-700-024
(10) Do this task: Spoiler Mixer Adjustment, TASK 27-61-00-820-805.
------------------------- END OF TASK ---------------------------
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Spoiler Mixer No-Back Assembly Test
Figure 505 (Sheet 1 of 5)/27-61-00-990-809
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Spoiler Mixer No-Back Assembly Test
Figure 505 (Sheet 2 of 5)/27-61-00-990-809
737-600/700/800/900
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EFFECTIVITY
GUN ALL 27-61-00
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Spoiler Mixer No-Back Assembly Test
Figure 505 (Sheet 3 of 5)/27-61-00-990-809
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-61-00
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Spoiler Mixer No-Back Assembly Test
Figure 505 (Sheet 4 of 5)/27-61-00-990-809
737-600/700/800/900
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EFFECTIVITY
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