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747-400 FAULT ISOLATION/MAINT MANUAL
STANDBY POWER TRANSFER RELAY, R7227
GENERATOR CIRCUIT  GEN 1-PHASE A, X435 LIGHTNING PROTECTOR  LIGHTNING PROTECTOR GEN 1-PHASE B, X436 
BREAKER 1,  LIGHTNING PROTECTOR 
C951  GEN 1-PHASE C, X437 
P6 PANEL 
P514 
C 
GENERATOR 
CIRCUIT 
BREAKER 2,  BUS TIE 
C952  BREAKER 1, 
C957 
P614 

BUS TIE BREAKER 2, C958
LIGHTNING PROTECTOR GEN 2-PHASE A, X441 LIGHTNING PROTECTOR LIGHTNING PROTECTOR
GEN 2-PHASE B, X442 GEN 2-PHASE C, X443
P514 AND P614 PANELS
D
LIGHTNING PROTECTOR LIGHTNING PROTECTOR GEN 3-PHASE B, X445 BUS TIE GEN 3-PHASE A, X444 LIGHTNING PROTECTOR BREAKER 3, GEN 3-PHASE C, X446
C959 GENERATOR CIRCUIT BREAKER 3, BUS TIE
C953 BREAKER 4, P515
C960 GENERATOR CIRCUIT BREAKER 4, C954
P615
LIGHTNING PROTECTORGEN 4-PHASE C, X440 LIGHTNING PROTECTOR GEN 4-PHASE B, X439 LIGHTNING PROTECTOR GEN 4-PHASE A, X438
P515 AND P615 PANELS
E
AC Generation - Component Location (Details from Sht 1) Figure 102 (Sheet 2)
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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747-400
FAULT ISOLATION/MAINT MANUAL

SPLIT SYSTEM BREAKER, C961
P92 PANEL
F
AUXILIARY POWERBREAKER 2, C956
AUXILIARY POWER BREAKER 1, C955
P714 PANEL P715 PANEL GH
AC Generation - Component Location (Details from Sht 1)
Figure 102 (Sheet 3)

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747-400 FAULT ISOLATION/MAINT MANUAL
BCU NO. 2,
GCU NO. 3, G11
GCU NO. 4, G8

SEE L
AGCU NO. 1,
G9
SEE K G26
SEE K

AGCU NO. 2, SEE J G27 GCU NO. 2, G7 SEE J
BCU NO. 1,
SEE K G10 E2 RACK
SEE L
(REF) GCU NO. 1, G6 SEE K
E1 RACK (REF)
FWD
ELECTRICAL AND ELECTRONICS RACK I FROM SHT 1 AGCU (TYPICAL) J
GCU (TYPICAL)  BCU (TYPICAL) 
K  L 
AC Generation - Component Location 
Figure 102 (Sheet 4) 

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747-400 FAULT ISOLATION/MAINT MANUAL MAIN STATIC INVERTER, M7438 SEE N 
SEE N APU STATIC INVERTER, M8128 
E-8 RACK  M E-30 EQUIP RACK FROM SHT 1
(REF) RACK E-33 
E-8 EQUIPMENT RACK 

STATIC INVERTER (TYPICAL) N
AC Generation - Component Location Figure 102 (Sheet 5)
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747-400 FAULT ISOLATION/MAINT MANUAL
APU GENERATORS
SEE O
SEE P
O
APU GENERATOR 2,G3 ADAPTER PLATE QAD RING
APU GENERATOR 1,G2
　
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