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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL 
SPAR REAR  BOND SURFACE ELECTRICAL 

ELECTRICAL BOND SURFACE
1
17.
 SOCKET HEAD SCREW

18.
 WASHER (5 LOCATIONS)

11. BONDING JUMPER
SEE

AND THE MATING SURFACE OF THE MOTOR/IMPELLER UNIT FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).
Fuel Override/Jettison Pump Motor/Impeller Unit Figure 401 (Sheet 3)
K04855
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

REAR SPAR
ELECTRICAL BOND SURFACE
2
OVERRIDE/
JETTISON
PUMP
HOUSING

ELECTRICAL
BOND
SURFACE
2
ELECTRICAL BOND SURFACE
B

PUMP HOUSING
4. MOTOR/IMPELLER UNIT
BONDING CLIP
ELECTRICAL
BOND SURFACE
2
MOUNTING BOLT
(AMM 28-31-07/401)

17. SOCKET HEAD SCREW
(DO NOT REMOVE) 18. WASHER
BONDING JUMPER BUILD-UP
REAR SPAR
(DO NOT DISASSEMBLE FROM BONDING CLIP)
BONDING JUMPER C
2 PREPARE THE FAYING SURFACE OF THE OVERRIDE/JETTISON PUMP HOUSING AND THE MATING SURFACE OF THE IMPELLER UNIT FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).
Fuel Override/Jettison Pump Motor/Impeller Unit Figure 401 (Sheet 4)
L24205
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A
747-400
MAINTENANCE MANUAL

BONDING JUMPER
(CONNECTION AT THE BRACKET)

PREPARE THE FAYING SURFACE OF THE ELECTRICAL CONNECTOR
BRACKET FOR AN ELECTRICAL SURFACE BOND (SWPM 20-20-00).

Override/Jettison Pump Housing
Figure 401 (Sheet 5)

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L24206
A
747-400 MAINTENANCE MANUAL
 3) 414C5 FUEL OVRD/JTSN PUMP FWD 3
 (c)  P415 Power Distribution Center - Right
 1) 415M32 FUEL OVRD/JTSN PUMP CTR RIGHT
 2) 415A38 FUEL OVRD/JTSN PUMP AFT 2
 3) 415B38 FUEL OVRD/JTSN PUMP AFT 3

 S 034-154
 (4)  
Do these steps to remove the electrical connectors (View A):

 (a)  
Disconnect the electrical connector (2) from the pressure switch (3).

 NOTE: Refer to this table for the equipment numbers.
____
 ~............................................................ | | Equipment Number | | Location ............................ | | Switch | Connector | .............................................................. | No. 2 Main Tank - Inbd | S238 | DS238 | | No. 2 Main Tank - Outbd | S239 | DS239 | | No. 3 Main Tank - Inbd | S240 | DS240 | | No. 3 Main Tank - Outbd | S241 | DS241 | | Center Wing Tank - Left | S66 | DS66 | | Center Wing Tank - Right | S68 | DS68 | 2.................................…...........…..............1
 (b)  Disconnect the airplane wiring at the pump electrical connector (5).
 NOTE: Refer to this table for the equipment numbers.
____
 ~............................................................ | | Equipment Number | | Location ............................ | | Motor | Connector | .............................................................. | No. 2 Main Tank - Inbd | M223 | DM223 | | No. 2 Main Tank - Outbd | M222 | DM222 | | No. 3 Main Tank - Inbd | M226 | DM226 | | No. 3 Main Tank - Outbd | M227 | DM227 | | Center Wing Tank - Left | M224 | DM224 | | Center Wing Tank - Right | M225 | DM225 | 2.................................…...........…..............1
　
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