(1)
Location Zone
412 Engine 1 - HPC Fwd Case 3:30 or 9:30 o'clock
422 Engine 2 - HPC Fwd Case 3:30 or 9:30 o'clock
432 Engine 3 - HPC Fwd Case 3:30 or 9:30 o'clock
442 Engine 4 - HPC Fwd Case 3:30 or 9:30 o'clock
(2)
Access Panel
415 Left Thrust Reverser Half - Engine 1
416 Right Thrust Reverser Half - Engine 1
425 Left Thrust Reverser Half - Engine 2
426 Right Thrust Reverser Half - Engine 2
435 Left Thrust Reverser Half - Engine 3
436 Right Thrust Reverser Half - Engine 4
445 Left Thrust Reverser Half - Engine 4
446 Right Thrust Reverser Half - Engine 4
C.
Prepare to Remove the Control Valves
S 864-002-N00
(1) For the applicable engine, open these circuit breakers that follow and install the DO-NOT-CLOSE tags:
(a) P6 Main Power Distribution Panel
1) 6G1 FUEL SHUTOFF VALVE ENG 1
2) 6G15 SCU ALT PWR ENG 1
3) 6G23 ENG SCU 1
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
4. RIGHT HPC SECONDARY FLOW CONTROL VALVE
SEE B
SEE A
FWD
A
5. BOLT
(6 LOCATIONS) 6. EEC ELECTRICAL
3. GASKET 4. HPC SECONDARY CONNECTOR
FLOW CONTROL
1. BOLT VALVE
(3 LOCATIONS)
2. COVER
(VENTED)
7. COOLING AIR HOSE
13.
PLUG 8. HOSE CLAMP
9. COVER (PLAIN) FWD
10.
GASKET
12. CAP ASSEMBLY 2
10. GASKET
1. BOLT
11. ADAPTER (3 LOCATIONS)
16. WASHERS 1
15. BRACKET 1
1
ENGINES WITH PW SB 73-164
2
ENGINES WITH PW SB 75-62R2
B
OR WITHOUT PW SB 75-91
HPC Secondary Flow Control Valve Installation
Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
SEE C
4. LEFT HPC SECONDARY
FLOW CONTROL VALVE SEE D
FWD
C
HPC Secondary Flow Control Valve Installation
Figure 401 (Sheet 2)
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
5. BOLT (6 LOCATIONS)
3. GASKET
4. HPC SECONDARY
1. BOLT FLOW CONTROL VALVE
(3 LOCATIONS) 10. GASKET 12. CAP ASSEMBLY 2
11. ADAPTER
9. COVER (PLAIN)
1. BOLT (3 LOCATIONS)8. HOSE CLAMP 15. NUT
10. GASKET
7. COOLING
AIR 2. COVER
HOSE 13. PLUG (VENTED)
24. NUT FWD NO. 3 CLAMP 1. BOLT
5 BEARING 14. BRACKET
BREATHER
20. BRACKET TUBE 16. BOLT
5
21. TRIM LINE OIL TUBE
6. EEC ELECTRICAL 23. CLAMP CONNECTOR
5
22. BOLT 5
D
2
ENGINES WITH PW SB 75-62R2 OR WITHOUT PW SB 75-91
5
ENGINES WITH PW SB 79-52
HPC Secondary Flow Control Valve Installation Figure 401 (Sheet 3)
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75-33-01 中国航空网 www.aero.cn 航空翻译 www.aviation.cn 本文链接地址：747-400 AMM 飞机维护手册 大气 AIR 2(92)
