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TASK 27-62-21-000-801
2. Speed Brake Forward Drum and Lever Brake Removal
(Figure 401)
A. References
Reference Title
27-62-00-800-802 Remove Pressure from the Speed Brake Hydraulic Systems A and B
(P/B 201)
B. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
211 Flight Compartment - Left
212 Flight Compartment - Right
C. Access Panels
Number Name/Location
112A Forward Access Door
113AW Forward Nose Wheel Well Panel
113BW Forward Nose Wheel Well Panel
D. Prepare for the Removal
SUBTASK 27-62-21-860-001
(1) Make sure the systems A and B hydraulic power is off. To remove it, do this task: Remove
Pressure from the Speed Brake Hydraulic Systems A and B, TASK 27-62-00-800-802.
SUBTASK 27-62-21-860-002
(2) Open this circuit breaker and install safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
B 9 C00440 FLIGHT CONTROL AUTO SPEED BRAKE
SUBTASK 27-62-21-860-003
(3) Put the speed brake lever in the DOWN position.
SUBTASK 27-62-21-010-001
(4) To get access to the forward equipment area, do this step:
Open this access panel:
Number Name/Location
112A Forward Access Door
SUBTASK 27-62-21-010-003
(5) To get access to the speed brake forward drum [1] and lever brake [11], do this step:
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EFFECTIVITY
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Remove these access panels:
Number Name/Location
113AW Forward Nose Wheel Well Panel
113BW Forward Nose Wheel Well Panel
E. Speed Brake Forward Drum and Lever Brake Removal
SUBTASK 27-62-21-020-001
(1) Remove bolt [3] and washer [4] to disconnect the lever arm assembly [2] and remove bushing
[5].
SUBTASK 27-62-21-020-002
(2) Disconnect the speed brake control cables SBA and SBB:
(a) Install cable clamps on the cables to keep a small tension on the cables.
(b) Disconnect the turnbuckles installed in the aft part of the lower nose compartment.
(c) Install tags on the cables for identification.
(d) Remove the cable retainers and the cables from the speed brake forward drum [1].
SUBTASK 27-62-21-020-003
(3) Remove the speed brake forward drum [1]:
(a) Remove quadrant bolt [18] and spacer [17].
(b) Remove the speed brake forward drum [1] from the shaft.
1) Hold the cam roller lever arm [16] away from the speed brake forward drum [1].
SUBTASK 27-62-21-020-004
(4) Remove the lever brake assembly [11]:
(a) Remove the bolt [12], washer [13], and nut [14] to disconnect the input rod [15] from the
lever brake assembly [11].
(b) Remove the bolt [7], washer [8], nut [9], and cotter pin [10] to disconnect the actuator [6]
from the lever brake assembly [11].
(c) Remove the nut [21], bearing [19], and bearing [20] at the end of the lever brake shaft.
(d) Remove the lever brake assembly [11] from the airplane.
------------------------- END OF TASK ---------------------------
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EFFECTIVITY
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Speedbrake Forward Drum and Lever Brake Installation
Figure 401 (Sheet 1 of 2)/27-62-21-990-801
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AIRCRAFT MAINTENANCE MANUAL
EFFECTIVITY
GUN ALL 27-62-21
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Speedbrake Forward Drum and Lever Brake Installation
Figure 401 (Sheet 2 of 2)/27-62-21-990-801
737-600/700/800/900
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EFFECTIVITY
GUN ALL 27-62-21
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TASK 27-62-21-400-801
3. Speed Brake Forward Drum and Lever Brake Installation
(Figure 401)
A. References
Reference Title
27-62-00-710-801 Speed Brake Control System Operational Test (P/B 501)
27-62-00-820-802 Speed Brake Control Cable Adjustment (P/B 501)
27-62-37-400-802 Speed Brake Lever Position Sensor Adjustment (P/B 401)
B. Expendables/Parts
AMM Item Description AIPC Reference AIPC Effectivity
1 Speed brake forward drum 27-62-31-02-145 GUN ALL
C. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
211 Flight Compartment - Left
212 Flight Compartment - Right
D. Access Panels
Number Name/Location
112A Forward Access Door
　
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