(b)
On the overhead circuit breaker panel, P7: 1) 7H21, FUEL XFR VLV MAIN 1 2) 7H23, FUEL XFR VALVE RES 2B & 3B
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747-400 MAINTENANCE MANUAL
(c)
On the DC power distribution panel, P180: 1) 180B2 or 180M9, FUELING LTS - HOT
or FUELING PWR - HOT BAT 2) 180C25, FUELING LTS PANEL 3) 180C26, FUELING LTS RECP
(d)
On the left power distribution center, P414: 1) 414F22, FUELING PWR
S 914-035
WARNING: DO NOT TOUCH THE CARD BEFORE YOU DO THE PROCEDURE FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE CARD.
(2)
Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
S 024-028
(3)
Remove the card A9 from the fuel system card file
(AMM 20-11-22/401).
TASK 28-22-14-404-011
5. Valve Position Logic Card A9 Installation (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 28-16-01, SSM 28-16-02, SSM 28-21-07 Sht. 1, SSM 28-22-01, SSM 28-22-02, SSM 28-31-01
(5)
WDM 28-16-11, WDM 28-16-13, WDM 28-16-14, WDM 28-22-11, WDM 28-22-22 WDM 28-31-11
B.
Access
(1)
Location Zone 115 Area Between Nose Gear Well and Fuselage, Left
C.
Procedure
S 914-038
WARNING: DO NOT TOUCH THE CARD BEFORE YOU DO THE PROCEDURE FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE CARD.
(1) Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-41-02/201).
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747-400 MAINTENANCE MANUAL
S 424-029
(2)
Install the card in the fuel system card file at location A9 (AMM 20-11-22/401).
S 414-013
(3)
Put the coverplate on the fuel system card file.
S 434-034
(4)
Install the screws (10 locations) that attach the coverplate to the fuel system card file.
S 864-014
(5)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
On the main power distribution panel, P6: 1) 6F17, CTR L & MAIN 3 JTSN VLV 2) 6G2, FUEL SHUTOFF VALVE ENG 2 3) 6L15, FUEL XFEED VALVE ENG 2
(b)
On the overhead circuit breaker panel, P7: 1) 7H21, FUEL XFR VLV MAIN 1 2) 7H23, FUEL XFR VALVE RES 2B & 3B
(c)
On the DC power distribution panel, P180: 1) 180B2 or 180M9, FUELING LTS - HOT
or FUELING PWR - HOT BAT 2) 180C25, FUELING LTS PANEL 3) 180C26, FUELING LTS RECP
(d)
On the left power distribution center, P414: 1) 414F22, FUELING PWR
S 724-044
(6) Do this Task: Valve Position Logic Card A9 Operational Test (AMM 28-22-14/501).
TASK 28-22-14-004-015
6. Valve Position Logic Card A11 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 28-16-01, SSM 28-16-02, SSM 28-21-07 Sht. 2, SSM 28-22-01, SSM 28-02-02, SSM 28-31-01
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