S 034-006
(4)
Remove the bolt (20) that holds the duct support rod (17) to the HP/IP manifold (7).
S 034-007
(5)
Disconnect the upstream pressure supply line to the pressure controller (6) from the HP/IP manifold (7).
S 034-017
(6)
Remove the coupling (2) from the HP/IP manifold (7) and the high pressure shutoff valve (HPSOV) (1) joint.
S 024-007
(7)
Remove the coupling (4) from the HP/IP manifold (7) and the pressure regulating valve (PRV) (13) joint.
S 034-008
(8)
Remove the coupling (10) from the intermediate pressure duct (14) and the check valve (12) joint.
S 034-016
(9)
Remove the HP/IP manifold (7) and check valve (12) assembly from the engine.
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36-11-02
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A
747-400 MAINTENANCE MANUAL
S 034-010
(10)
Remove the coupling (8) from the HP/IP manifold (7) and the check valve (7) joint.
S 024-009
(11)
Remove the IP check valve (12) from the HP/IP manifold (7).
S 034-004
(12)
Remove the E-seals from all the duct and check valve flanges.
S 914-010
(13)
Put a cover on all the open ducts or valve ports to keep out unwanted objects.
TASK 36-11-02-404-011
3. Intermediate Pressure Check Valve Installation (Fig. 401)
______________________________________________
A. Consumable Materials
(1)
G00095 Detector - Leak, Leak-Tek (160X)
(2)
D01062, Never-Seez, Pure Nickel Special, NSBT-8N
(High temperature anti-seize compound)
B.
Parts
~.............................................................................. | AMM | | AIPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Intermediate Pressure Check Valve | 36-11-05| 01 | 390 | | | 2 | Coupling | | | 40 | | | 3 | Seal | | | 60 | | | 4 | Coupling | | | 35 | | | 5 | Seal | | | 55 | 2......…........…...................................…..........….....….........1
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A
747-400
MAINTENANCE MANUAL
C. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 71-00-00/201, Power Plant
(3)
AMM 78-31-00/201, Thrust Reverser System
D. Access
(1)
Location Zone 412 Engine 1 - High Pressure Compressor Case 9 o'clock 422 Engine 2 - High Pressure Compressor Case 9 o'clock 432 Engine 3 - High Pressure Compressor Case 9 o'clock 442 Engine 4 - High pressure Compressor Case 9 o'clock
(2)
Access Panel
415 Left Thrust Reverser Half - Engine 1
425 Left Thrust Reverser Half - Engine 2
435 Left Thrust Reverser Half - Engine 3
445 Left Thrust Reverser Half - Engine 4
E. Install the Check Valve
S 024-012
(1)
Remove the duct covers.
S 214-009
(2)
Examine the ducts and IP check valve surfaces for areas of wear and abrasion.
S 214-010
CAUTION:_______THE VALVE GASKETS ARE EASILY DAMAGED. INSTALLATION OF DAMAGED GASKETS WILL CAUSE LEAKAGE.
(3)
Examine all the E-seals.
(a)
The E-seal must not have cracks, dents, or other damage.
(b)
Replace all the damaged E-seals.
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