(5)  
Shut Off Valve

 (a)  Engine Driven Pump (EDP) Shut Off Valve (SOV) status is represented by circular symbology. The SOV OPEN symbol is represented by two vertical lines (enclosed by a circle) which overlay the hydraulic system outline. The SOV CLOSED symbol is represented by two horizontal lines (enclosed by a circle) which are perpendicular to the hydraulic system outline. For invalid SOV data, the symbol is replaced by a low intensity white circle. The following table represents the display logic for the SOV symbols.
 ~..................................................... | SHUT OFF VALVES | ....................................................... | EDP SOV | WHITE EDP ON | SOV SYMBOL | SYMBOL | | IS CLOSED | SYMBOL DISPLAYED | DISPLAYED | COLOR | ....................................................... | YES | YES | SOV OPEN | WHITE | ....................................................... | YES | NO | SOV CLOSED | WHITE | ....................................................... | NO | N/A | SOV OPEN | WHITE | 2...........…..................….............…........1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 31-61-00
 ALL  ú ú 10 Page 82Z ú Feb 10/96
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (6)  Demand Pumps
 (a)  Demand pump (DEM) status is represented by colored circular symbology. The DEM ON symbol is represented by two vertical lines which overlay the hydraulic lines and are enclosed by a circle. The DEM AUTO symbol is represented by the message AUTO enclosed by a circle. The DEM OFF symbol is represented by the message OFF enclosed by a circle. For invalid DEM data, the symbol is replaced by a low intensity white circle. The following table represents the display logic for the DEM symbols.
 ~................................................................ | DEMAND PUMPS | .................................................................. | DEM PUMP | DEM PUMP | DEM PUMP | DEM PUMP | SYMBOL | SYMBOL | | SWITCH | SWITCH | PRESSURE | IS | DISPLAYED| COLOR | | IS ON | IS AUTO | IS LOW | RUNNING | | | .................................................................. | YES | NO | NO | N/A | DEM ON | WHITE | .................................................................. | YES | NO | YES | N/A | DEM ON | AMBER | .................................................................. | NO | YES | NO | YES | DEM ON | WHITE | .................................................................. | NO | YES | YES | YES | DEM AUTO | AMBER | .................................................................. | NO | YES | N/A | NO | DEM AUTO | CYAN | .................................................................. | NO | NO | N/A | N/A | DEM OFF | AMBER | 2..........…..........…..........…..........…..........….........1
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 31-61-00
 ALL  ú ú 05 Page 83 ú Jun 15/98
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 (7)  Auxiliary AC Motor Pumps
 (a)  Auxiliary ac pump (AUX) status is represented by colored circular symbology. The AUX ON symbol is represented by two vertical lines which overlay the hydraulic lines and are enclosed by a circle. The AUX OFF symbol is represented by the message OFF enclosed by a circle. For invalid AUX data, the symbol is replaced by a low intensity white circle. The following table represents the display logic for the AUX pump symbols.
 ~..................................................... | AUXILIARY AC MOTOR PUMPS | ....................................................... | DEM PUMP | EDP | SYSTEM | SYMBOL | SYMBOL | | SWITCH IS | PRESSURE | PRESSURE | DISPLAYED| COLOR | | AUX | IS LOW | IS LOW | | | ....................................................... | YES | YES | NO | AUX ON | WHITE | ....................................................... | YES | YES | YES | AUX ON | AMBER | ....................................................... | YES | NO | N/A | AUX ON | CYAN | ....................................................... | NO | N/A | N/A | AUX OFF | WHITE | 2...........…..........…..........…..........…........1
 (8)  Engine Driven Pumps
 (a)  Engine Driven Pump (EDP) status is represented by colored square box symbology. The EDP ON symbol is represented by two vertical lines which overlay the hydraulic lines and are enclosed by a box. The EDP OFF symbol is represented by the message OFF enclosed by a box. For invalid EDP data, the symbol is replaced by a low intensity white box. The following table represents the display logic for the EDP symbols.
　
中國航空網(wǎng) m.k6050.com
航空翻譯 www.aviation.cn
本文鏈接地址：747-400 AMM 飛機(jī)維護(hù)手冊(cè) 指示/記錄系統(tǒng) 2(77)