GEAR (SYNOPTIC)
AUXILIARY EICAS DISPLAY
EICAS Display
Figure 7
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747-400
MAINTENANCE MANUAL
B. Control
(1) The landing gear indication operates automatically when electrical power is applied.
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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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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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