28-31-01
ALL ú ú 35 Page 401 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(7)
WDM 28-31-25, WDM 28-31-26
B.
Equipment
(1)
Container - 1-quart capacity to collect fuel
(2)
MS35275-250 - Screw, Motor/Impeller Retention (Quantity 2)
C.
Access
(1)
Location Zones
135 Wing Landing Gear Well, Left
136 Wing Landing Gear Well, Right
571 Rear Spar to Landing Gear Support Beam, Left
671 Rear Spar to Landing Gear Support Beam, Right
D.
Procedure
S 864-002
(1) Make sure the ground lockpins for the landing gear are installed.
S 494-003
WARNING: DO THE PROCEDURE IN AMM 32-00-30/201 TO INSTALL THE DOOR LOCKS.
_______ THE DOORS OPEN AND CLOSE QUICKLY AND CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(2)
Install the door locks for the wing and body gear
(AMM 32-00-30/201).
S 864-004
(3)
Open these applicable circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P180 DC Power Distribution Panel
1) 180E3 FUEL OVRD/JTSN PMP CONT FWD 2&3
2) 180E18 FUEL OVRD/JTSN PMP CONT AFT 2&3
3) 180E2 FUEL OVRD/JTSN PMP CONT CTR L
4) 180H18 FUEL OVRD/JTSN PMP CONT CTR R
(b)
P414 Power Distribution Center - Left
1) 414D2 FUEL OVRD/JTSN PUMP CTR LEFT
2) 414C2 FUEL OVRD/JTSN PUMP FWD 2
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28-31-01
ALL ú ú 11 Page 402 ú Oct 18/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
OVERRIDE/JETTISON PUMP
SEE A
REAR
SPAR DISCHARGE LINE
YDMM-LTF-00-0001-P(M)
PUMP INLET LINE
MOUNTING BOLT (8 LOCATIONS) (DO NOT REMOVE)
2. ELECTRICAL
YDMM-28-31-0012-D l17053 CONNECTOR
10. PACKING
3. PRESSURE SWITCH
9. COUPLING
1. PACKING
HOUSING 4. MOTOR/IMPELLER UNIT
B
ELECTRICAL BOND SURFACE
8. PACKING
SEE B 5. PUMP
PACKING6. 7. PACKING A CONNECTOR ELECTRICAL
B
A
OVERRIDE/JETTISON PUMP
AIRPLANE
ELECTRICAL WIRING
A
FWD
____PUMP WITH A FACE MOUNT ELECTRICAL CONNECTOR SHOWN.
NOTE: CWT AND OUTBOARD MAIN 2 AND 3 PUMP INSTALLATION SHOWN. INBOARD MAIN 2 AND 3 PUMP INSTALLATION SIMILAR.
Fuel Override/Jettison Pump Motor/Impeller Unit Figure 401 (Sheet 1)
L24195
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28-31-01
ALL ú ú 03 Page 403 ú Jun 18/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
HOUSING MOUNTING BOLT (8 LOCATIONS)
LOCKWIRE
11. BONDING (INSTALLED ON BOLTS
JUMPER WITH LOCKWIRE PROVISIONS)
5. PUMP
ELECTRICAL
PULL HERE FOR CONNECTOR
PUMP REMOVAL
15. BONDING
CLIP
11. BONDING
13.
DRAIN PLUG
JUMPER
14.
PACKING
12. BONDING (NOT SHOWN)
CLIP LOCKWIRE
(AIRPLANES WITH A FACE MOUNTED ELECTRICAL CONNECTOR)
(INSTALLED ON BOLTS
WITH LOCKWIRE
PROVISIONS) HOUSING MOUNTING BOLT
A-A
11. BONDING (8 LOCATIONS)JUMPER
5. PUMP ELECTRICAL CONNECTOR
15. BONDING
CLIP AIRPLANE ELECTRICAL
HANDLE WIRING
13. DRAIN PLUG 16. BONDING
14. PACKING
12. BONDING JUMPER (NOT SHOWN) CLIP
11. BONDING JUMPER
(AIRPLANES WITH A BRACKET MOUNTED ELECTRICAL CONNECTOR) A-A
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