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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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747-400 FAULT ISOLATION/MAINT MANUAL
APU FIRE DETECTION SYSTEM
COMPONENT  FIG. 102 SHT  QTY  ACCESS/AREA  REFERENCE 
CARD - AFOLTS APU FIRE/DUAL DUCT OVHT, YLPA22  2  1  LEFT OF NOSE GEAR WHEEL WELL, FIRE DETECTION CARD FILE, M826  26-10-01 
CARD - APU FIRE DET LP 1, YLPA21  2  1  FIRE DETECTION CARD FILE, M826 LEFT OF NOSE GEAR WHEEL WELL,  26-10-01 
CARD - APU FIRE DET LP 2, YLPA23 CARD FILE - (REF 31-51-00, FIG. 101) MAWEA, M7952  2  1  FIRE DETECTION CARD FILE, M826LEFT OF NOSE GEAR WHEEL WELL, 26-10-01 
CIRCUIT BREAKERS - 1 FLT COMPT, P6
ENG FIRE/TURB OVHT APU LOOP A, C8807  1  6H14  * 
ENG FIRE/TURB OVHT APU LOOP B, C8809  1  6H15  * 
FIRE SW UNLOCK, C8822  1  6H7  * 
LOOP A APU ALTN PWR, C8808  1  6H5  * 
DETECTOR - APU FIRE LH ACCESS DOOR, M216  4  1  317A, APU ACCESS DOOR LEFT  26-15-02 
DETECTOR - APU FIRE UPPER SUPPORT, M217 M3236,M3237,M3238,M3239,M3991 DIODE - (REF 31-01-06, FIG. 101)  4  1  317,318, APU ACCESS DOORS  26-15-02 
CMC ENABLE 7, R8059 FIRE/OVHT TEST 5, R8052 RELAY - (REF 31-01-36, FIG. 101) MODULE - APU FIRE SHUTDOWN, M869 FIRE CONTROL, M7326 MODULE - (REF 26-21-00, FIG. 101) MODULE - (REF 26-11-00, FIG. 101) MISCELLANEOUS SWITCHING, M7317 3  1  FWD INBOARD RIGHT 138, BODY LANDING GEAR AFT AND  26-15-04 
SWITCH - APU FIRE, S246  1  1  MODULE, M7326 FLT COMPT, P5, FIRE CONTROL  * 
SWITCH - FIRE/OVHT TEST (S1) R EFIS/EICAS INTERFACE, M7351 L EFIS/EICAS INTERFACE, M7353 C EFIS/EICAS INTERFACE, M7352 UNIT - (REF 31-61-00, FIG. 101) 1  1  FLT COMPT, P5, MISCELLANEOUS SWITCHING MODULE, M7317  * 

* SEE WDM EQUIPMENT LIST
APU Fire Detection System - Component Index
Figure 101

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747-400
FAULT ISOLATION/MAINT MANUAL

MISCELLANEOUS SWITCHING MODULE, M7317

BTL A  BTL B 
DISCH  a  DISCH  a 

BTL A  BTL B 
DISCH  a  DISCH  a 

r w FWD ARMED  r w AFT ARMED 

FIRE CONTROL MODULE, M7326 (REF)

APU Fire Detection System - Component Location
Figure 102 (Sheet 1)

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747-400 FAULT ISOLATION/MAINT MANUAL

E/E EQUIPMENT COMPARTMENT
CARD
CARD
CARD
APU FIRE
APU FIRE
AFOLTS APU FIRE/DUAL
DET LP 1, YLPA21
DET LP 2, YLPA23
DUCT OVHT, YLPA22

 
 
A1  A2 A3  A4 A5  A6  A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26A27 A28 A29 A30 A31 A32 A33 A34 A35 

FIRE DETECTION CARD FILE, M826
C
APU Fire Detection System - Component Location
Figure 102 (Sheet 2)

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747-400 FAULT ISOLATION/MAINT MANUAL
　
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