(d)
PSD747-21, Circuit Card Adapter
(e)
PSD747-23, Interconnect Cable
C.
References
(1)
AMM 12-11-01/301, Fuel Servicing
(2)
AMM 12-11-03/301, Fuel Sump
(3)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(4)
AMM 24-22-00/201, Electrical Power
(5)
AMM 27-81-00/201, Leading Edge Flap Systems
(6)
AMM 28-22-16/401, Fuel System Card File
(7)
AMM 28-26-00/201, Defueling
(8)
AMM 28-41-00/501, Fuel Quantity Indicating System
(9)
AMM 28-41-01/401, Fuel Quantity Tank Unit
(10)
AMM 28-41-02/401, Fuel Quantity Compensator
(11)
AMM 28-41-09/401, Fuel Quantity Indicating System - Wire Bundle
(12)
AMM 28-41-11/401, Fuel Quantity Densitometer
(13)
AMM 28-41-13/401, Fuel Quantity Processor Unit
(14)
AMM 32-00-30/201, Landing Gear Door Locks
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D.
E.
F.
A
747-400 MAINTENANCE MANUAL
(15)
AMM 34-61-02/401, Control Display Unit
(16)
AMM 45-10-00/501, Central Maintenance Computer (CMC)
(17)
SSM 28-41-01, SSM 28-41-03, SSM 28-41-03, SSM 28-41-04, SSM 28-41-05, WDM 28-41-21, WDM 28-41-22, WDM 28-41-23, WDM 28-41-24
Access
(1)
Location Zones 125 Area Below Forward Cargo Container Compartment, Left 131 Center Section Wing Box, Left 511 Leading Edge to Front Spar, Left 611 Leading Edge to Front Spar, Right
(2)
Access Panel 125B Electronics Access Door 511FB Access Panel 611FB Access Panel
Preconditions
S 865-312
(1)
These conditions are necessary for this task:
(a)
Fuel Quantity Indication System (FQIS) serviceable.
(b)
The procedures in this task require different fuel quantity configurations (empty tanks and tanks with some fuel in them).
(c)
Electrical Power On (AMM 24-22-00/201).
(d)
Fuel System Card File serviceable (AMM 28-22-16/401).
(e)
Intergrated Display System (IDS) serviceable
(AMM 31-61-00/501).
(f)
Airplane must be in ground mode (AMM 32-09-02/201).
(g)
CDU installed (AMM 34-61-02/401).
(h)
Central Maintenance Computer (CMC) serviceable
(AMM 45-10-00/501).Prepare for the Compensator and Tank Unit Component Test
NOTE: For the compensator and tank unit tests the components must be
____ dry. For the densitometer component tests, the densitometers must be fully covered with fuel.
S 865-248
(1)
Supply the electrical power (AMM 24-22-00/201).
(2)
Defuel the applicable fuel tank(s) (AMM 28-26-00/201).
S 685-250
(3)
Drain the fuel from the applicable fuel tank sump (AMM 12-11-03/301).
S 655-249
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A
747-400 MAINTENANCE MANUAL
G. Compensator and Tank Unit Test (at the tank wall)
S 865-075
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
On the main power distribution panel, P6:
1) 6D5, FUEL QTY 1
2) 6D6, FUEL QTY 2
(b)
On the DC power distribution panel, P180:
1) 180M9, FUELING PWR - HOT BAT
2) 180C25, FUELING LTS PANEL
3) 180C26, FUELING LTS RECP
(c)
On the left power distribution center, P414:
1) 414F22, FUELING PWR
