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Reservoirs Depressurization, TASK 29-09-00-860-802.
E. Flap Priority Valve Removal
SUBTASK 27-51-04-020-001
(1) Remove the flap priority valve [1]:
(a) Disconnect the hydraulic lines [2], [6] and [7] from the valve [1]:
1) Put a 5 gallon (19 liters) fuel resistant container, STD-1054 below the valve [1] to hold
hydraulic fluid.
2) Disconnect the hydraulic lines [2], [6] and [7] from the valve [1].
3) Install plugs in the hydraulic lines [2], [6] and [7].
(b) Remove the nuts [11] and washers [12] and remove the valve [1] from the bracket [10].
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SUBTASK 27-51-04-020-002
(2) If you will install a new valve [1], remove the union [5], union [8] and reducer [3]:
(a) Remove the union [5], reducer [8] and reducer [3] and packings [4] and packing [9] from the
valve [1].
------------------------- END OF TASK ---------------------------
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Flap Priority Valve Installation
Figure 401 (Sheet 1 of 2)/27-51-04-990-801
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Flap Priority Valve Installation
Figure 401 (Sheet 2 of 2)/27-51-04-990-801
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TASK 27-51-04-400-801
3. Flap Priority Valve Installation
(Figure 401)
A. References
Reference Title
27-51-00-860-801 Trailing Edge Flap System Operation With Primary Control (P/B 201)
29-11-00-860-801 Hydraulic System A or B Pressurization (P/B 201)
29-11-00-860-805 Hydraulic System A or B Power Removal (P/B 201)
B. Consumable Materials
Reference Description Specification
C00913 Compound - Nondrying Resin Mix Corrosion
Inhibiting Material
BMS3-27
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)
C. Expendables/Parts
AMM Item Description AIPC Reference AIPC Effectivity
1 Valve 27-51-04-01-005 GUN 001-028, 101-121,
155-157, 201-999
27-51-04-01-050 GUN 001-028, 101-121,
155-157, 201-999
3 Reducer Not Specified
4 Packing 27-51-04-01-025 GUN 001-028, 101-121,
155-157, 201-999
27-51-04-01-035 GUN 001-028, 101-121,
155-157, 201-999
5 Union 27-51-04-01-030 GUN 001-028, 101-121,
155-157, 201-999
8 Union 27-51-04-01-040 GUN 001-028, 101-121,
155-157, 201-999
9 Packing 27-51-04-01-045 GUN 001-028, 101-121,
155-157, 201-999
11 Nut 27-51-04-01-015 GUN 001-028, 101-121,
155-157, 201-999
12 Washer 27-51-04-01-010 GUN 001-028, 101-121,
155-157, 201-999
D. Location Zones
Zone Area
134 Main Landing Gear Wheel Well, Body Station 663.75 to Body Station
727.00 - Right
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E. Flap Priority Valve Installation
SUBTASK 27-51-04-420-001
(1) If you will install a new valve [1], install the union [5], union [8] and reducer [3] and packings [4]
and packing [9] from the valve [1]:
(a) Apply MCS 352B fluid, D00054 or fluid, D00153 to the new packings [4] and packing [9].
(b) Put the packings [4] and packing [9] and the union [5], union [8] and reducer [3] in the
valve [1].
SUBTASK 27-51-04-420-002
(2) Install the flap priority valve [1]:
(a) Apply compound, C00913 to the shank and threads of the bolts on the bracket [10].
(b) Put the valve [1] in its location on the bracket [10].
(c) Install the nuts [11] and washers [12] to hold the valve [1].
(d) Remove the plugs from the hydraulic lines [2], [6] and [7].
(e) Connect the hydraulic lines [2], [6] and [7] to the valve [1].
SUBTASK 27-51-04-860-002
WARNING: KEEP PERSONS AND EQUIPMENT CLEAR OF THE FLIGHT CONTROL SURFACES, THE
THRUST REVERSERS, AND THE LANDING GEAR. THESE COMPONENTS CAN MOVE
　
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