S 745-051
(20)
In the MCDU Scratchpad, input the data as follows:
(a)
PORT E 10
(b)
LABEL 271
(c)
SDI 10
S 745-052
(21)
Make sure that the BIT 15 is "1" (Main 1 transfer valve disagree).
S 865-060
(22)
Close this circuit breaker:
(a)
On the P7 panel:
1) 7H21, FUEL XFR VALVE MAIN 1
S 745-054
(23)
Make sure that the Bit 15 is "0" (Main 1 transfer valve agree).
S 865-062
(24)
Open this circuit breaker:
(a)
On the P7 panel: 1) 7H23, FUEL XFR VALVE RES 2B & 3B
S 745-061
(25)
Choose "Input Monitoring" from page 2 of the CMC menu.
S 745-062
(26)
In the MCDU scratchpad, input the data as follows:
(a)
PORT E/10
(b)
LABEL 271
(c)
SDI 10
S 745-063
(27)
Make sure that the Bit 12 is "1" (Reserve 2B valve disagree).
S 865-064
(28)
Close this circuit breaker:
(a)
On the P7 panel: 1) 7H23, FUEL XFR VALVE RES 2B & 3B
(29)
Make sure that the Bit 12 is "0" (Reserve 2B valve agree).
S 745-065
TASK 28-22-14-725-072
4. Valve Position Logic Card A11 Functional Test_____________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 28-22-16/401, Fuel System Card File
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A
747-400
MAINTENANCE MANUAL
(3)
AMM 31-61-00/501, Intergrated Display System (IDS)
(4)
AMM 32-09-02/201, Air/Ground Relays
(5)
AMM 34-61-02/401, Control Display Unit
(6)
AMM 45-10-00/201, Central Maintenance Computer System
(7)
Location Zones
221 Control Cabin, Left
222 Control Cabin, Right
(8)
Access Panel
521CB Refuel Control Panel Access Door
B.
Preconditions
S 865-121
(1)
These conditions are necessary for this task:
(a)
Reserve Tank Transfer System serviceable.
(b)
Fuel Feed System serviceable.
(c)
Fuel Jettison System serviceable.
(d)
A specific fuel quantity is not necessary for this task.
(e)
Electrical Power On (AMM 24-22-00/201).
(f)
Fuel System Card File serviceable (AMM 28-22-16/401).
(g)
Integrated Display System (IDS) serviceable (AMM 31-61-00/501).
(h)
Airplane must be in the ground mode (AMM 32-09-02/201).
(i)
CDU installed (AMM 34-61-02/401).
(j)
Central Maintenance Computer (CMC) serviceable (AMM 45-10-00/201).
C.
Procedure
S 865-009
(1)
Supply electrical power (Ref 24-22-00/201).
S 865-107
(2)
Open this circuit breaker:
(a)
On the main power distribution panel P6:
1) 6E17, CTR R & MAIN 2 JTSN VLV
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 865-083
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