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A
747-400
MAINTENANCE MANUAL
OUTBOARD MAIN BOOST PUMPS SEE A BOOST PUMPS INBOARD MAIN SEE A OUTBOARD MAIN BOOST PUMPS SEE A
BOOST PUMPS INBOARD MAIN SEE A
MOUNTING PAD (REF) SPAR OR DRY BAY
UNIT 1. MOTOR/IMPELLER
SEE B
INDEX PIN 4. PACKING 3. PACKING 2. PACKING CONNECTOR ELECTRICAL PUMP
INBOARD AND OUTBOARD MAIN BOOST PUMPS A
NOTE:BOOST PUMP INSTALLED ON THE SPAR SHOWN; BOOST PUMP INSTALLED IN THE DRY BAY IS ALMOST THE SAME. FACE MOUNTED ELECTRICAL CONNECTOR SHOWN.
Main Tank Boost Pump Motor/Impeller Unit Installation Figure 401 (Sheet 1)
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28-22-03
ALL ú ú 01 Page 406 ú Oct 15/98
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747-400
MAINTENANCE MANUAL
7. LOCKWIRE (2 LOCATIONS)
5.
SCREW
6.
WASHER STRUCTURE
(QTY 2)
(3 LOCATIONS) MOUNTING BOLTS (8 LOCATIONS)
5. SCREW (AMM 28-22-12/401) (2 LOCATIONS) DO NOT REMOVE
INDEX PIN HOLE
A
ELECTRICAL BOND SURFACE
1 BOOST PUMP
9. BONDING A 5. SCREW
CLIP 8. BONDING JUMPER 11. BOLT
8. BONDING
MAIN 1 AND 4 FORWARD AND AFT BOOST PUMPS
JUMPER
AND MAIN 2 AND 3 FORWARD BOOST PUMPS B
ELECTRICAL
5.
SCREW
BOND
6.
WASHER
12. WASHER SURFACE
(QTY 2) (2 LOCATIONS) 1 13. NUT
BONDING CLIP
MOUNTING BOLT (DO NOT REMOVE)
BONDING JUMPER
INDEX
PIN HOLE A-A
ELECTRICAL5. SCREW
A
BOND SURFACE
(3 LOCATIONS) 1
8. BONDING
A
JUMPER
10. BONDING CLIP
MAIN 2 AND 3 AFT BOOST PUMPS B
1
PREPARE THE FAYING SURFACE OF THE BONDING CLIP AND THE MATING SURFACE OF THE MOTOR/IMPELLER UNIT FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).
Main Tank Boost Pump Motor/Impeller Unit Installation Figure 401 (Sheet 2)
H46541
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MAINTENANCE MANUAL
C. Parts
~.............................................................................. | MM | | IPC | ................. ............................ | FIG | ITEM | NOMENCLATURE | SUBJECT | FIG | ITEM | ................................................................................ | 401 | 1 | Motor/Impeller Unit | 28-22-03 | 05 | 760 | | | 2 | Packing | | | 763 | | | 3 | Packing | | | 762 | | | 4 | Packing | | | 761 | | | 5 | Screw | | | 760A | | | 6 | Washer | | | 760B | 2......…........…...................................…..........….....….........1
D. References
(1)
AMM 20-11-14/701, Metal Surfaces
(2)
AMM 28-11-00/801, Fuel Tank Repair
(3)
AMM 51-21-04/701, Alodine Coating
(4)
SWPM 20-20-00, Electrical Bond and Ground
(5)
SSM 28-22-03, 28-22-04
(6)
WDM 28-22-31, WDM 28-22-32, WDM 28-22-33, WDM 28-22-34
E.
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
545CB Boost Pump Access Door
545DB Boost Pump Access Door
645CB Boost Pump Access Door
645DB Boost Pump Access Door
F.
Install the Motor/Impeller Unit for the Main Tank Boost Pumps
S 164-020
(1)
Prepare these faying surfaces for an electrical surface bond (SWPM 20-20-00).
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