S 034-024
(2)
Remove the lock wire from the couplings.
S 034-025
(3)
Manually disconnect the coupling (3 locations) from the jet pump.
(a)
Discard the O-rings (one O-ring per coupling).
S 034-026
(4)
Remove the bolt and washer (2 locations) from the jet pump.
S 014-027
(5)
Remove the jet pump.
TASK 28-15-10-404-013
3. Jet Pump Installation (Fig. 401)_____________________
A. Equipment
(1)
Bonding Meter (SWPM 20-20-00) Approved for use in fuel vapor area.
B.
Consumable Materials
(1)
D00128 Petrolatum - Technical, VV-P-236
C.
References
(1)
AMM 28-00-00/201, Fuel - Maintenance Practices
(2)
AMM 28-11-00/201, Fuel Tanks
(3)
AMM 28-11-09/401, Spanwise Beam Access Door
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-15-10
ALL ú ú 03 Page 402 ú Oct 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
FUEL SCAVENGE SYSTEM
SEE A
CENTER WING TANK
(REF)
JET PUMP
FLOAT VALVE IN THE (4 LOCATIONS)
NO. 2 MAIN TANK FLOAT VALVE IN THE
NO. 3 MAIN TANK
A A
NO. 2 MAIN TANK NO. 3 MAIN TANK
(REF) (REF)
A A
FUEL STRAINER
HOUSING
(2 LOCATIONS)
FLOAT VALVE IN
THE CENTER WING
TANK
(2 LOCATIONS)
FWD
FUEL SCAVENGE SYSTEM
OUTBD A
INTERCOSTAL REAR SPAR OF THE
JET PUMP (REF) JET PUMP CENTER WING TANK (REF)
SEE B SEE C
MID-SPAR OF THE
SPANWISE BEAM
SPANWISE BEAM
NO. 2 (REF) CENTER WING TANK
NO. 1 (REF)
(REF) A-A Jet Pump for the Fuel Scavenge System Figure 401 (Sheet 1)
A77236
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-15-10
ALL ú ú 03 Page 403 ú Feb 10/94
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
BOLT WASHER SPANWISE BEAM NO. 2
NUT (REF) (2 LOCATIONS)
INTERCOSTAL
JET PUMP (REF)
BONDING JUMPER (2 LOCATIONS)
COUPLING (3 LOCATIONS)
FUEL TUBE LOCKWIRE(REF) BOTTOM OF THE CENTER WING TANK (REF)
SUPPORT BRACKETFUEL INLET SCREEN (EXAMPLE)(REF)
JET PUMP
B
BOLT WASHER NUT (2 LOCATIONS)
BONDING JUMPER
(3 LOCATIONS) SPANWISE BEAM
COUPLING FOR NO. 1 (REF)
THE JET PUMP
(REF) INTERCOSTAL (3 LOCATIONS) JET PUMP REFUEL TUBE (REF) (RIGHT SIDE ONLY)
FUEL TUBE (REF)
BOTTOM OF THE CENTER WING TANK (REF)
FUEL INLET SCREEN (REF)
JET PUMP
____ C
NOTE: RIGHT SIDE ALMOST THE SAME.
Jet Pump for the Fuel Scavenge System Figure 401 (Sheet 2)
A77287
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
28-15-10
ALL ú ú 03 Page 404 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
(4)
SWPM 20-20-00, Electrical Bond and Ground
D.
Access
(1)
Location Zones
131 Center Section Wing Box, Left
132 Center Section Wing Box, Right
(2)
Access Panels
131EZ Center Wing Tank Access Door
132CZ Center Wing Tank Access Door
131AZ Spanwise Beam Access Door
131BZ Spanwise Beam Access Door
131CZ Spanwise Beam Access Door
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