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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL
B. Access
(1)
Location Zone 115 Area Between Nose Gear Well and Fuselage, Left
C.
Procedure
S 864-022
(1)
Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
On the main power distribution panel, P6: 1) 6C18, JTSN NOZZLE VLV CONT R 2) 6F17, CTR L & MAIN 3 JTSN VLV 3) 6G4, FUEL SHUTOFF VALVE ENG 4 4) 6G5, FUEL SHUTOFF VALVE APU 5) 6L17, FUEL XFEED VALVE ENG 4
(b)
On the overhead circuit breaker panel, P7: 1) 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 914-040
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 024-032
(3)
Remove the card A12 from the fuel system card file (AMM 20-11-22/401).
TASK 28-22-14-404-024
9. Valve Position Logic Card A12 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 28-16-02, SSM 28-21-07, SSM 28-22-01, SSM 28-22-02, SSM 28-25-03, SSM 28-31-01, SSM 28-31-03
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A
747-400
MAINTENANCE MANUAL
(5)
WDM 28-16-13, WDM 28-22-12, WDM 28-22-24, WDM 28-25-31, 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 914-041
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).
S 424-033
(2)
Install the card in the fuel system card file at location A12 (AMM 20-11-22/401).
S 864-026
(3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
On the main power distribution panel, P6:
1) 6C18, JTSN NOZZLE VLV CONT R
2) 6F17, CTR L & MAIN 3 JTSN VLV
3) 6G4, FUEL SHUTOFF VALVE ENG 4
4) 6G5, FUEL SHUTOFF VALVE APU
5) 6L17, FUEL XFEED VALVE ENG 4
(b)
On the overhead circuit breaker panel, P7:
1) 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
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
S 724-045
(4) Do this Task: Valve Position Logic Card A12 Operational Test (AMM 28-22-14/501).
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