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 ENG 2VALVE - TURBINE VANE AND BLADE COOLING AIR,  5,6  2  REVERSER HALF, HPC CASE425 OR 426, LEFT OR RIGHT THRUST  75-24-01 
ENG 3 VALVE - TURBINE VANE AND BLADE COOLING AIR,  5,6  2  REVERSER HALF, HPC CASE435 OR 436, LEFT OR RIGHT THRUST  75-24-01 
ENG 4 VALVE - TURBINE VANE AND BLADE COOLING AIR,  5,6  2  REVERSER HALF, HPC CASE 445 OR 446, LEFT OR RIGHT THRUST  75-24-01 
VALVE - 2.9 BLEED, ENG 1  5 2  REVERSER HALF, HPC CASE415 OR 416, LEFT OR RIGHT THRUST  75-32-03 
VALVE - 2.9 BLEED, ENG 2  5  2  REVERSER HALF, HPC CASE425 OR 426, LEFT OR RIGHT THRUST  75-32-03 
VALVE - 2.9 BLEED, ENG 3  5  2  REVERSER HALF, HPC CASE435 OR 436, LEFT OR RIGHT THRUST  75-32-03 
R EFIS/EICAS INTERFACE, M7351 L EFIS/EICAS INTERFACE, M7353 C EFIS/EICAS INTERFACE, M7352UNIT - (REF 31-61-00, FIG 101) VALVE - 2.9 BLEED, ENG 4  5  2  REVERSER HALF, HPC CASE 445 OR 446, LEFT OR RIGHT THRUST  75-32-03

Air - Component Index
Figure 101 (Sheet 5)

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A / PW4000 SERIES /
747-400 / ENGINES /FAULT ISOLATION/MAINT MANUAL ////////////////////////
FLT COMPT
BAROMETRIC
SWITCH
S1622 (ENG 1)
S1623 (ENG 2)
S1624 (ENG 3)
S1625 (ENG 4)

A
P6 PANEL
FWD
Air - Component Location
Figure 102 (Sheet 1)

TAI VALVE ACCESS DOOR 451AR (ENG 1) 461AR (ENG 2) 471AR (ENG 3) 481AR (ENG 4)
SEE A
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A / PW4000 SERIES /
747-400 / ENGINES /FAULT ISOLATION/MAINT MANUAL ////////////////////////
LEFT THRUST  RIGHT THRUST 
REVERSER HALF 415 (ENG 1) 425 (ENG 2)  DSEE SHT 3  REVERSER HALF 416 (ENG 1) 426 (ENG 2) 
435 (ENG 3)  436 (ENG 3) 
445 (ENG 4)  SEE  B  SEE  C  446 (ENG 4) 
SHT 3 
LEFT THRUST 
REVERSER HALF 
415 (ENG 1) 
425 (ENG 2) 
435 (ENG 3) 
445 (ENG 4) 
RIGHT THRUST 
REVERSER HALF  SEE  I 
SEE  E  416 (ENG 1) 426 (ENG 2)  SHT 4 
SEE  F  SHT 4  436 (ENG 3) 446 (ENG 4)  SEE  H 
SHT 4  SHT 4  SEE  G 
SHT 4 
HPT CASE 
COOLING 
SEE  K  MANIFOLDS 
SHT 5 
SEE  J 
SHT 5 

FWD 
SHT 5 LSEE  TURBINE VANE COOLING AIR DUCTS B  LPT CASE COOLING MANIFOLDS 
Air - Component Location Figure 102 (Sheet 2) 

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A / PW4000 SERIES /
747-400 / ENGINES /FAULT ISOLATION/MAINT MANUAL ////////////////////////
LPT CASE  TURBINE CASE 
LPT CASE COOLING MANIFOLDS  VALVE COOLING AIR SHUTOFF  SHT 5 TURBINE VANE COOLING AIR DUCTS SEE M  CABLE VALVE CONTROL COOLING AIR  VALVE ACTUATOR TURBINE CASE COOLING AIR 
SEE  N 
HPT CASE 
COOLING  SHT 5 
MANIFOLDS 

SEE  O 
LPT CASE  HPT CASE  HPT CASE  SHT 6 
COOLING  COOLING  COOLING  SEE  Q  SEE  P 
COLLECTOR  VALVE AIR SHUTOFF  COLLECTOR  FWD  SHT 6  SHT 6 
C 
LEFT THRUST 
REVERSER HALF 
INNER WALL 
(REF) 
　
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