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TAI  TAI 
APU  AIR SUPPLY CONTROL 
SYS FAULT  SYS FAULT  ON  SYS FAULT  FAULT SYS  AND TEST UNIT, M7957 
1  2  VALVE  3  4 
ON  ON  ENGINE  ON  ON 
OFF  OFF  BLEED  OFF  OFF 

BLEED CONTROL MODULE, M7328
A

E2-4
117AL
FWD
B
Distribution - Component Location
Figure 102 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 FAULT ISOLATION/MAINT MANUAL 
PRESSURE REGULATING VALVE, V352  HIGH PRESSURE SHUTOFF VALVE, V347 
SEE  C  SEE  C 
SHT 3ESEE PRECOOLER BLEED AIR  FAN AIR MODULATING VALVE, V9 
SEE  E  SHT 3 

INTERMEDIATE 
PRESSURE 
PRESSURE  HIGH PRESSURE  CHECK VALVE 
CONTROLLER, M7200  M7191 CONTROLLER,  SEE  C 
SEE  D  SEE  D 
PRESSURE 
REGULATING 
VALVE, V352 
HIGH PRESSURE 
CONTROLLER, 
M7191 

FWD 
CHECK VALVE PRESSURE INTERMEDIATE  V347 SHUTOFF VALVE, HIGH PRESSURE 
C  PRESSURE CONTROLLER, M7200  D  FWD 
Figure 102 (Sheet 2) Distribution - Component Location 

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 ALL  ú ú 02 Page 105 ú Oct 10/91
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 747-400 FAULT ISOLATION/MAINT MANUAL 
BLEED AIR PRECOOLER  FAN AIR MODULATING VALVE, V9  SEE G ISOLATION VALVE, LEFT, RIGHT WING V108,V109 
SEE H (SHUTOFF) VALVE, V121 APU BLEED AIR 
FWD 
E  FROM SHT 2  APU CHECK VALVE  SEE F APU CHECK VALVE 
FWD 
VALVE APU CHECK 
F 

LEFT, RIGHT WING ISOLATION VALVE,
V108,V109

G  APU BLEED AIR (SHUTOFF) VALVE, V121
NOTE: LEFT WING ISOLATION VALVE SHOWN,
____  H
RIGHT WING ISOLATION VALVE EQUIVALENT.
Distribution - Component Location Figure 102 (Sheet 3)
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
PRESSURE REGULATING
AND SHUTOFF VALVE,

FAN AIR V83 (ENGINE 1),V86 (ENGINE 3),TEMPERATURE V85 (ENGINE 2),V87 (ENGINE 4)
SENSOR SEE J
SEE I
FAN AIR TEMPERATURE SENSOR I
FWD
V83 (ENGINE 1),V85 (ENGINE 2), V86 (ENGINE 3),V87 (ENGINE 4) PRESSURE REGULATING AND SHUTOFF VALVE,  NOT USED 
J  K 
Figure 102 (Sheet 4) Distribution - Component Location 

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 ALL  ú ú 04 Page 107 ú Feb 10/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
ENGINE BLEED AIR 
PRESSURE COMPENSATOR 
DUCT 
SEE  M 
PNEUMATIC GROUND 
AIR CONNECTORS 
SEE  L 

AIR DRIVEN PUMP PNEUMATIC DUCT SCREEN
FWD
INBD
PNEUMATIC GROUND AIR CONNECTORS FWD (2 LOCATIONS)
PNEUMATIC GROUND AIR CONNECTORS ENGINE BLEED AIR PRESSURE COMPENSATOR DUCT LM
Distribution - Component Location Figure 102 (Sheet 5)
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