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(a) Remove the bolts [6] and washers [7] that attach the bypass valve assembly [4] to the
bracket [2].
(b) Remove the bypass valve assembly [4] from the bracket [2].
SUBTASK 27-51-02-020-004
(4) If you will install a new bypass valve assembly [4], remove the unions [13] and packings [14]
from the bypass valve assembly [4].
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Trailing Edge Flap Bypass Valve Assembly Installation
Figure 401 (Sheet 1 of 4)/27-51-02-990-802
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Trailing Edge Flap Bypass Valve Assembly Installation
Figure 401 (Sheet 2 of 4)/27-51-02-990-802
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Trailing Edge Flap Bypass Valve Assembly Installation
Figure 401 (Sheet 3 of 4)/27-51-02-990-802
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Trailing Edge Flap Bypass Valve Assembly Installation
Figure 401 (Sheet 4 of 4)/27-51-02-990-802
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TASK 27-51-02-400-801
3. Trailing Edge Flap Bypass Valve Assembly Installation
(Figure 401)
A. General
(1) This task includes the installation of the bypass valve assembly as a unit. The bypass valve
assembly includes the housing, the valve and the valve motor.
B. References
Reference Title
27-51-00-440-801 Trailing Edge Flap System Reactivation (P/B 201)
27-51-02-720-801 Trailing Edge Flap Bypass Valve Functional Test (P/B 501)
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)
D00070 Fluid - Hydraulic, Petroleum Base MIL-PRF-5606
(Replaces
MIL-H-5606)
G50171 Compound - Corrosion Inhibiting Compound,
Interior Application - D5026NS or ZC-026
D. Expendables/Parts
AMM Item Description AIPC Reference AIPC Effectivity
4 Valve assembly 27-51-02-01-005 GUN ALL
14 Packing 27-51-02-01-025 GUN ALL
E. Location Zones
Zone Area
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
F. Trailing Edge Flap Bypass Valve Assembly Installation
SUBTASK 27-51-02-860-007
(1) Make sure that this circuit breaker is open:
F/O Electrical System Panel, P6-2
Row Col Number Name
A 7 C00210 FLIGHT CONTROL FLAP SHUTOFF VALVES
SUBTASK 27-51-02-420-001
(2) If they are not installed, install the unions [13] in the bypass valve assembly [4]:
(a) Apply MCS 352B fluid, D00054 or fluid, D00070 to the new packings [14].
(b) Put the packings [14] and the unions [13] in their location on the bypass valve assembly [4].
SUBTASK 27-51-02-420-002
(3) Install the bypass valve assembly [4]:
(a) Make sure the mating surface of the bypass valve assembly [4] and the bracket [2] are
clean for electrical bonding.
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(b) Put the bypass valve assembly [4] in its position on the bracket [2].
(c) Install the bolts [6] and washers [7] to attach the bypass valve assembly [4] to the bracket
[2].
(d) Make sure the bonding resistance between the bypass valve assembly [4] and the bracket
[2] is less than 0.0025 ohm.
SUBTASK 27-51-02-420-003
(4) Connect the hydraulic lines [1] to the bypass valve assembly [4]:
(a) Remove the caps from the hydraulic lines [1] and the plugs from the ports.
(b) Connect the hydraulic lines [1] to the bypass valve assembly [4].
SUBTASK 27-51-02-210-003
(5) Before you connect the electrical connector [5], examine the connector for corrosion.
　
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