(c)
AMM 28-31-00/001, Fuel Jettison System
(4)
AMM 28-11-00/201, Fuel Tanks is divided into paragraphs that prepare fuel tanks for entry as follows:
(a)
Purging and entry of main fuel tank
(b)
Purging and entry of reserve tank
(c)
Purging and entry of center wing tank
(d)
Purging and entry of wing surge tank
M.
It is necessary to remove the inspar removable ribs to replace the reserve tank or outboard tank wire bundles (AMM 57-12-01/401).
(1)
For removal and installations of these ribs, it can be necessary to put the wing in the jig position (SRM 51-50-01).
N.
The tasks for wire bundle removal and installation must be performed in sequence without changing airplane preparation or configuration.
O.
After you replace a wire bundle you can use the EICAS maintenance pages to display the capacitance value of the individual FQIS components. (Reference the Dry Tank Capacitance Test) (AMM 28-41-00/501). Although the capacitance check can provide system information, it is not necessary to do this test. The only test that is necessary is the CMCS ground test, <FUEL QUANTITY IND. If the ground test shows a "PASS" indication the fuel quantity indication system is operational. (Reference the Fuel Quantity Indication System Ground Test) (AMM 28-41-00/501).
TASK 28-41-09-004-151
2. FQIS Wire Bundle From Main or Reserve Tanks Removal
___________________________________________________
A. References
(1)
AMM 28-11-00/201, Fuel Tanks
(2)
AMM 28-11-02/401, Reserve and Main Tank Access Door
(3)
AMM 28-26-00/201, Defueling
(4)
AMM 51-31-01/201, Seals and Sealing
(5)
AMM 57-12-01/401, Inspar Removable Rib
(6)
SRM 51-50-02, Support of Airplane in Jigged Position
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A
747-400
MAINTENANCE MANUAL
FQIS WIRE BUNDLE
INBOARD MAIN TANK
INSTALLATION
FQIS WIRE BUNDLE
SEE
INSTALLATION
SEE
B
SEE
Fuel Quantity Indication System Wire Bundle Installation
Figure 401 (Sheet 1)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
F133/F132 F127/F126 M7872/M7873
F143/F142
F149/F148
FWD
WING INBOARD TANK
(LEFT WING SHOWN, RIGHT WING OPPOSITE)
Fuel Quantity Indication System Wire Bundle Installation
Figure 401 (Sheet 2)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 MAINTENANCE MANUAL
OUTBOARD
WING OUTBOARD TANK
(LEFT WING SHOWN, RIGHT OPPOSITE)
Fuel Quantity Indication System Wire Bundle Installation
Figure 401 (Sheet 3)
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ú 03 Page 406
ú Oct 10/90
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
C
F181/F180
TANK ROUTING INBOARD F185/F184
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