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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 865-095
 (28)
 Close this circuit breaker:

 (a)  
On the P7 panel:
 1) 7H22, FUEL XFR VALVE RES 2A & 3A

 S 745-096
 (29) Make sure that the Bit 13 is "0" (Reserve 3A valve agree).
 TASK 28-22-14-725-012
 5.  Valve Position Logic Card A12 Operational Test______________________________________________
 A. References
 (1)  
AMM 24-22-00/201, Manual Control

 (2)  
AMM 28-22-16/401, Fuel System Card File

 (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

 B.
Access

 (1)  
Location Zones
 221 Control Cabin, Left
 222 Control Cabin, Right

 (2)  
Access Panel
 521CB Refuel Control Panel Access Door

 C.
Preconditions

 S 865-122
 (1)  
These conditions are necessary for this task:

 (a)  
Reserve Tank Transfer System serviceable.

 (b)  
Fuel Feed System serviceable.

 (c)  
APU Fuel-Feed System Serviceable

 (d)  
Fuel Jettison System serviceable.

 (e)  
A specific fuel quantity is not necessary for this task.

 (f)  
Electrical Power On (AMM 24-22-00/201).

 (g)  
Fuel System Card File serviceable (AMM 28-22-16/401).

 (h)  
Integrated Display System (IDS) serviceable (AMM 31-61-00/501).

 (i)  
Airplane must be in the ground mode (AMM 32-09-02/201).

 (j)  
CDU installed (AMM 34-61-02/401).

 (k)  
Central Maintenance Computer (CMC) serviceable (AMM 45-10-00/201).

 D.
Procedure

 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 865-014

 (2)  
Open this circuit breaker:

 (a)  
On the main power distribution panel P6: 1) 6C18, JTSN NOZZLE VLV CONT R

 S 865-013
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400 MAINTENANCE MANUAL
 (3)  S 725-045Make sure that the EICAS message "JETT NOZZLE R" shows on the top EICAS display.
 (4)  S 865-115Close this circuit breaker: (a) On the P6 panel: 1) 6C18, JETT NOZZLE VLV CONT R
 (5)  S 725-063Make sure the EICAS status message, JETT NOZZLE R, does not show on the top EICAS display.
 (6)  S 865-044Open this circuit breaker: (a) On the P6 panel: 1) 6F17, CTR L & MAIN 3 JTSN VLV
 (7)  S 865-046Make sure this circuit breaker is closed: (a) On the P6 panel: 1) 6E17, CTR R & MAIN 2 JTSN VLV
 (8)  S 725-016Make sure the EICAS status message, JETT XFER VLV, shows on the bottom EICAS display.
 (9)  S 865-017Close this circuit breaker: (a) On the P6 panel: 1) 6F17, CTR L & MAIN 3 JTSN VLV
 S 725-018

 (10) Make sure the EICAS status message, JETT XFER VLV, does not show on the bottom EICAS display.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 28-22-14
 ALL  ú ú 04 Page 513 ú Feb 10/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
　
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