(3)
AMM 28-11-02/401, Reserve and Main Tank Access Door
(4)
AMM 28-26-00/201, Defueling
B.
Access
(1)
Location Zones 541 Inbd Main Tank (Part), Front Spar to Mid Spar, Left 544 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 545 Inbd Main Tank (Part), Mid Spar to Rear Spar, Left 641 Inbd Main Tank (Part), Front Spar to Mid Spar, Right 644 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right 645 Inbd Main Tank (Part), Mid Spar to Rear Spar, Right
(2)
Access Panels
544AB Fuel Tank Access Door
545BB Fuel Tank Access Door
545CB Boost Pump Access Door
545DB Boost Pump Access Door
644AB Fuel Tank Access Door
645BB Fuel Tank Access Door
645CB Boost Pump Access Door
645DB Boost Pump Access Door
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
ALL ú ú 01 Page 401 ú Feb 15/99
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
INBOARD MAIN
OUTBOARD MAIN BOOST PUMPS
BOOST PUMPS
SEE A
SEE A
25. WASHEROUTBOARD MAIN (4 LOCATIONS)
BOOST PUMPS SEE A
26. SUPPORT BRACKET
24. SCREW (4 LOCATIONS)
INBOARD MAIN
OUTBOARD MAIN BOOST PUMPS
BOOST PUMPS
SEE A B
21. BOLT 19. EJECTOR PUMP
(4 LOCATIONS) 23. NUT 22. WASHER 1. DISCHARGE PRESSURE LINE CHECK VALVE 2. PACKING 3. PUMP DISCHARGE
LINE
17. PACKING 20. PACKING
16. PUMP INLET LINE
4. PRESSURE SENSOR
18. REMOVAL LINE
CHECK VALVE 5.
6. PUMP COOLANT AND
PACKING
VAPOR DISCHARGE
15. WASHER
PORT (2 LOCATIONS)
7.
PRESSURE SWITCH
8.
GASKET
14. BOLT SEAL (2 LOCATIONS)
12. HOUSING
9. BOLT
13. SUPPORT (7 LOCATIONS)BRACKET
10. WASHER (7 LOCATIONS)
OUTBOARD MAIN 11. BONDING BOOST PUMP
JUMPER SEE B
SEE C
INBOARD AND OUTBOARD MAIN BOOST PUMPS
A
NOTE: BOOST PUMP INSTALLED ON THE FRONT SPAR SHOWN; BOOST PUMP INSTALLED IN THE DRY BAY AND REAR SPAR ARE ALMOST THE SAME.
Main Tank Boost Pump Housing Installation
Figure 401 (Sheet 1)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
ALL ú ú 01 Page 402 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
B47531
A
747-400 MAINTENANCE MANUAL
LOCKWIRE
9.
MOUNTING
BOLT
10.
WASHER
BONDING CLIP (7 LOCATIONS)
A
BOOST PUMP
MOTOR/IMPELLER
UNIT
A STRUCTURE PRESSURE SWITCH
BONDING JUMPER
(MAIN 1 AND 4 FORWARD AND AFT BOOST PUMPS
AND MAIN 2 AND 3 FORWARD BOOST PUMPS)
C
LOCKWIRE
STRUCTURE
(MAIN 3 AFT BOOST PUMP ONLY)
LOCKWIRE
INDEX PIN
A
BOOST PUMP MOTOR/IMPELLER UNIT
A
BONDING
CLIP
9.
MOUNTING BOLT
10.
WASHER (7 LOCATIONS)
BONDING JUMPER (MAIN 2 AND 3 AFT BOOST PUMPS)
C
Main Tank Boost Pump Housing Installation
Figure 401 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
ALL ú ú 01 Page 403 ú Oct 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
Main Tank Boost Pump Housing Installation
Figure 401 (Sheet 3)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-22-12
ALL ú ú 01 Page 404 ú Oct 15/98
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