NOTE: When you close the circuit breakers 5 minutes after you
____ stopped the power, FSMC card A and B BITE test starts.
1) P6, Main Power Distribution Panel a) 6F7, FUEL SYS MGMT CARD B b) 6F5, FUEL SYS MGMT CARD A
(c) Or, ground the FSMC A and FSMC B jacks found on the front of the M7852 fuel system card file.
NOTE:____This procedure starts the BITE immediately. It is not necessary to stop for five minutes.
S 865-004
(3) Get access to the CMCS EXISTING FAULTS menu for the fuel system (AMM 45-10-00/201).
NOTE: If it is necessary, use the CDU NEXT PAGE or PREV PAGE
____
keys to find the menu items.
(a)
Push the CDU MENU Key to show the CDU menu.
(b)
Push the CDU line-select key (LSK) adjacent to <EXISTING FAULTS on page 2 of the CMC menu.
(c)
Push the CDU LSK adjacent to <28 FUEL on the EXISTING FAULTS menu.
S 745-005
(4)
Go through EXISTING FAULTS MSG pages to make sure these CMC messages do not show:
(a)
FUEL SYSTEM MANAGEMENT CARD A FAIL - 28663
(b)
FUEL SYSTEM MANAGEMENT CARD B FAIL - 28664
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A 747-400 MAINTENANCE MANUAL
(5) S 745-006Make sure these EICAS status messages do not show on the auxiliary EICAS display. (a) FSMC A (b) FSMC B
NOTE:____ EICAS status messages FSMC A and FSMC B can show an EIU bus failure, an FSEIC master bus failure or a fuel system management card failure.
(6) S 865-007Remove electrical power if it is not necessary (AMM 24-22-00/201).
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747-400 MAINTENANCE MANUAL
VALVE POSITION LOGIC CARD - REMOVAL/INSTALLATION
________________________________________________
1. General_______
A. This procedure contains instructions to remove and install the valve position logic cards A6, A9, A11, and A12. Each valve position logic card (referred to as the card in this procedure) has a different task because of different circuit breakers.
B. The cards are found in the fuel system card file. Access to the card file is through the left crawlway, forward of the main equipment center.
TASK 28-22-14-004-001
2. Valve Position Logic Card A6 Removal (Fig. 401)____________________________________
A. References
(1)
AMM 20-11-22/401, E/E Rack-Mounted Module
(2)
AMM 20-41-02/201, Electrostatic Discharge Sensitive Devices
(3)
AIPC 28-15-60 Fig. 1
(4)
SSM 28-16-02, SSM 28-21-07 Sht. 1, SSM 28-22-01, SSM 28-22-02, SSM 28-31-01, SSM 28-31-03
(5)
WDM 28-16-12, WDM 28-22-11, WDM 28-22-21, WDM 28-31-11, WDM 28-31-13
B.
Access
(1)
Location Zone 115 Area Between Nose Gear Well and Fuselage, Left
C.
Procedure
S 864-002
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
On the main power distribution panel, P6: 1) 6D18, JTSN NOZZLE VLV CONT L 2) 6E17, CTR R & MAIN 2 JTSN VLV 3) 6G1, FUEL SHUTOFF VALVE ENG 1 4) 6L14, FUEL XFEED VALVE ENG 1
(b)
On the overhead circuit breaker panel, P7: 1) 7H22, FUEL XFER VALVE RES 2A & 3A
(c)
On the DC power distribution panel, P180:
1) 180B2 or 180M9, FUELING LTS - HOT or FUELING PWR - HOT BAT
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