GEAR (SYNOPTIC)
AUXILIARY EICAS DISPLAY
EICAS Display
Figure 7

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400
MAINTENANCE MANUAL

 B. Control
 (1)  The landing gear indication operates automatically when electrical power is applied.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
LANDING GEAR INDICATION SYSTEM
COMPONENT  FIG. 102 SHT  QTY  ACCESS/AREA  REFERENCE 
CIRCUIT BREAKERS - FLT COMPT, P7 
LANDING GEAR DSP & CONT - ALT, C97 1  7F23 
MAIN EICAS, M7345 AUXILIARY EICAS, M7346 LANDING GEAR DSP & CONT - PRI, C100 DISPLAY - (REF 31-61-00, FIG. 101)  1  7F22  * * 
SENSOR - BODY GEAR DOOR WARNING ALTERNATE -LH, S428 1  1  L AND R BODY GEAR WHEEL WELL  32-61-31 
SENSOR - BODY GEAR DOOR WARNING ALTERNATE -RH, S427 1  1  L AND R BODY GEAR WHEEL WELL  32-61-31 
SENSOR - BODY GEAR DOOR WARNING PRIMARY -LH, S408 1  1  L AND R BODY GEAR WHEEL WELL  32-61-31 
SENSOR - BODY GEAR DOOR WARNING PRIMARY -RH, S409 1  1  L AND R BODY GEAR WHEEL WELL  32-61-31 
LH, S414SENSOR - BODY GEAR DOWNLOCK ALTERNATE - 1  1  L AND R BODY LANDING GEAR  32-61-10
SENSOR - BODY GEAR DOWNLOCK ALTERNATE -RH, S413 1  1  L AND R BODY LANDING GEAR  32-61-10 
SENSOR - BODY GEAR DOWNLOCK PRIMARY -LH, S401 1  1  L AND R BODY LANDING GEAR  32-61-10 
SENSOR - BODY GEAR DOWNLOCK PRIMARY -RH, S403  1  1  L AND R BODY LANDING GEAR  32-61-10 
SENSOR - BODY GEAR TILT ALTERNATE -LH, S612 1  1  L AND R BODY LANDING GEAR  32-61-12
SENSOR - BODY GEAR TILT ALTERNATE -RH, S613 1  1  L AND R BODY LANDING GEAR  32-61-12 
SENSOR - BODY GEAR TILT PRIMARY -LH, S419 1  1  L AND R BODY LANDING GEAR  32-61-12 
SENSOR - BODY GEAR TILT PRIMARY -RH, S418 1  1  L AND R BODY LANDING GEAR  32-61-12 
SENSOR - BODY GEAR UPLOCK ALTERNATE -LH, S1636 2  1  L AND R BODY GEAR AFT WHEEL WELL 32-61-11 
SENSOR - BODY GEAR UPLOCK ALTERNATE -RH, S1637 2  1  L AND R BODY GEAR AFT WHEEL WELL  32-61-11 
SENSOR - BODY GEAR UPLOCK PRIMARY -LH, S400 2  1  L AND R BODY GEAR AFT WHEEL WELL  32-61-11 
SENSOR - BODY GEAR UPLOCK PRIMARY -RH, S402  2  1  L AND R BODY GEAR AFT WHEEL WELL  32-61-11 
SENSOR NOSE GEAR DOOR WARNING ALTERNATE -RH, S425 2  1  NOSE WHEEL WELL FORWARD BULKHEAD  32-61-30 
SENSOR - NOSE GEAR DOOR WARNING PRIMARY, S406  2  1  NOSE WHEEL WELL FORWARD BULKHEAD  32-61-30 
SENSOR - NOSE GEAR LOCK ALTERNATE, S424 2  1  NOSE LANDING GEAR  32-61-03 
SENSOR - NOSE GEAR LOCK PRIMARY, S397  2  1  NOSE LANDING GEAR  32-61-03 

* SEE WDM EQUIPMENT LIST
Landing Gear Indication System - Component Index
Figure 101 (Sheet 1)

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 FAULT ISOLATION/MAINT MANUAL
COMPONENT  FIG. 102 SHT  QTY  ACCESS/AREA  REFERENCE 
SENSOR - NOSE GEAR SQUAT ALTERNATE, S801  3  1  NOSE LANDING GEAR  32-61-01 
SENSOR - NOSE GEAR SQUAT PRIMARY, S800  3  1  NOSE LANDING GEAR  32-61-01 
SENSOR - NOSE GEAR UP ALTERNATE, S411  3  1  NOSE WHEEL WELL AFT BULKHEAD  32-61-02 
　
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