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1. General
A. This procedure has this inspection task:
(1) Aileron Transfer Mechanism
TASK 27-11-61-210-801
2. Aileron Transfer Mechanism Inspection
(Figure 601)
A. Location Zones
Zone Area
112 Area Forward of Nose Landing Gear Wheel Well
B. Access Panels
Number Name/Location
112A Forward Access Door
C. Procedure
SUBTASK 27-11-61-010-002
(1) To get access to the aileron transfer mechanism, do this task:
Open this access panel:
Number Name/Location
112A Forward Access Door
SUBTASK 27-11-61-210-001
(2) Do a general visual inspection of the aileron transfer mechanism.
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Aileron Transfer Mechanism Inspection
Figure 601/27-11-61-990-802
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AILERON POWER CONTROL UNIT - REMOVAL/INSTALLATION
1. General
A. This procedure has these tasks:
(1) A removal of the aileron power control unit
(2) An installation of the aileron power control unit.
B. The aileron power control unit is referred to as the "power control unit" in this procedure.
C. The two power control units supply hydraulic power to the aileron. The power control unit at the
bottom is connected to hydraulic system A. The power control unit at the top is connected to
hydraulic system B.
D. This procedure is applicable for the power control units that are connected to hydraulic systems A
and B.
TASK 27-11-71-000-801
2. Aileron Power Control Unit Removal
(Figure 401)
A. References
Reference Title
27-11-00-860-801 Remove Pressure from the Aileron Hydraulic Systems A and B
(P/B 201)
32-00-01-480-801 Landing Gear Downlock Pins Installation (P/B 201)
B. Tools/Equipment
Reference Description
STD-203 Container - Oil Resistant, 1 U.S.-Gal (3.8 l)
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. Prepare for the Removal
SUBTASK 27-11-71-480-001
WARNING: MAKE SURE THE DOWNLOCK PINS ARE INSTALLED ON ALL THE LANDING GEAR.
WITHOUT THE DOWNLOCK PINS, THE LANDING GEAR COULD RETRACT AND CAUSE
INJURIES TO PERSONS AND DAMAGE TO EQUIPMENT.
(1) If the downlock pins are not installed on all the landing gear, do this task: Landing Gear
Downlock Pins Installation, TASK 32-00-01-480-801.
SUBTASK 27-11-71-860-001
(2) Do this task: Remove Pressure from the Aileron Hydraulic Systems A and B,
TASK 27-11-00-860-801.
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E. Aileron Power Control Unit Linkage Removal
SUBTASK 27-11-71-020-001
(1) Disconnect the hydraulic lines [4] at the inlet and outlet ports of the power control unit
assembly [1]. Use a 1 U.S.-gal (3.81 l) oil resistant container, STD-203 to contain any hydraulic
fluid leakage. Discard the packing [2] and packing [6].
(a) Install the caps and plugs on the hydraulic lines [4] and ports.
SUBTASK 27-11-71-020-002
(2) Remove the power control unit assembly [1]:
(a) Remove the pin [13], nuts [12], washers [11], bushings [10], washers [9], and bolts [8] to
disconnect the pogos [7] from the power control unit assembly [1]. Discard the pin [13].
(b) Remove the bolts [30], washers [31], bolt [32] and washer [33] to disconnect the bracket
assemblies from the power control unit assembly [1].
(c) Remove the pin [23], nut [22], washer [21], nut [24], washers [25], bushings [26], washers
[28], and bolt [14] to disconnect the power control unit assembly [1] from the reaction
support assembly [27]. Discard the pin [23].
(d) Remove the nut [20], washer [19], washers [17], spacer [16] and bolt [15] to disconnect the
safety link [18] from the reaction support assembly [27].
(e) Move the reaction link [29] aft to get access to the power control unit assembly [1].
(f) Remove the pin [37], nut [38], washer [39], washer [35], and bolt [34] to disconnect the
power control unit assembly [1] from the output lever assembly [36]. Discard the pin [37].
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL飞机维护手册2(8)
