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F. Leading Edge Standby Shutoff Valve Removal
SUBTASK 27-81-91-020-001
(1) Remove the valve [13]:
(a) Disconnect the electrical connector [1] from the valve motor [2].
(b) Remove the four screws [5] and washers [6] that attach the valve to the hydraulic module
housing [].
(c) Put a 5 gallon (19 liter) container, STD-1154 below the valve [13] to catch hydraulic fluid that
drains from the valve [13].
(d) Carefully lift the valve [13] straight up to remove it from the standby flight controls hydraulic
module.
(e) Put a cover on the hydraulic module housing to keep contamination out of the open valve
hole.
------------------------- END OF TASK ---------------------------
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Leading Edge Standby Shutoff Valve Installation
Figure 201 (Sheet 1 of 2)/27-81-91-990-801
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Leading Edge Standby Shutoff Valve Installation
Figure 201 (Sheet 2 of 2)/27-81-91-990-801
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TASK 27-81-91-400-801
3. Leading Edge Standby Shutoff Valve Installation
(Figure 201)
A. General
(1) This task is the installation of the leading edge standby shutoff valve assembly, which contains
the motor and the valve.
B. References
Reference Title
12-12-00-610-801 Hydraulic Reservoir Servicing (P/B 301)
SWPM 20-60-03 Standard Wiring Practices Manual
C. Consumable Materials
Reference Description Specification
D00054 Fluid - Hydraulic Assembly Lubricant - MCS 352B
(Formally Monsanto MCS 352B)
D00153 Fluid - Hydraulic, Erosion Arresting, Fire Resistant BMS3-11, Type
IV
(interchange~
able&
intermixable
with Type V)
G50171 Compound - Corrosion Inhibiting Compound,
Interior Application - D5026NS or ZC-026
D. Location Zones
Zone Area
133 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Left
211 Flight Compartment - Left
212 Flight Compartment - Right
E. Leading Edge Standby Shutoff Valve Installation
SUBTASK 27-81-91-420-001
(1) If they are not installed, install the packing [9], backup rings [8], packings [11] and backup rings
[12]:
(a) Apply fluid, D00153 or MCS 352B fluid, D00054 to the packing [9], backup rings [8], packings
[11] and backup rings [12].
(b) Install the packing [9], backup rings [8], packings [11] and backup rings [12] on the valve
[13].
SUBTASK 27-81-91-420-002
(2) Install the valve [13]:
(a) Carefully install the valve [13] in the hydraulic module housing [10].
(b) Install the screws [5] and washers [5] to attach the valve [13] to the hydraulic module
housing [10].
(c) Install the lockwire on the screws [5].
(d) Before you connect the electrical connector [1], examine the connector for corrosion.
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WARNING: DO THE STEPS BELOW IF THE AIRPLANE OPERATES AT AIRPORTS WHERE
DEICING FLUID THAT CONTAIN POTASSIUM FORMATE IS USED. ALSO DO THE
STEPS FOR ALL AIRPLANES THAT YOU FOUND CORROSION IN THE
ELECTRICAL CONNECTORS IN THE MAIN WHEEL WELL. THE ELECTRICAL
CONNECTOR IS PART OF A SYSTEM THAT IS NECESSARY FOR SAFE FLIGHT.
(e) If there is corrosion, refer to (SWPM 20-60-03) to correct the problem.
(f) Apply the D5026NS or ZC-026 compound, G50171 to the connector (SWPM 20-60-03).
(g) Connect the electrical connector [1] to the valve motor [2].
NOTE: Corrosion inhibiting compound is applied to the exterior of the mated electrical
connectors after the operational test is completed.
F. Put the Airplane Back to Its Usual Condition
SUBTASK 27-81-91-860-004
(1) Remove the safety tag and close this circuit breaker:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 7 C00210 FLIGHT CONTROL FLAP SHUTOFF VALVES
SUBTASK 27-81-91-610-001
(2) If it is necessary to service the hydraulic reservoirs, do this task: Hydraulic Reservoir
Servicing, TASK 12-12-00-610-801.
　
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